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 double
Diesel
Registered: 02/12/11
Posts: 207
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 lighting question 
#610042 - 02/21/12 08:46 AM (12 years, 9 months ago) |
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Hello,
what happens if a plant is subject to 16 or more hours of light (during the day/night) which are non-consecutive, like broken by half or 1 hour?
also which plants can grow nicely in 24 hours of continuous light, other than cannabis? is there a list somewhere?
Also, assuming vegging plant absorb light at 430 nm and 660 nm (and everything else at different wavelengths isn't useful), what's the best ratio of them? How many lumens (also how many minimum) per square foot? Do they need IR and UV light?
Thank you
Edited by double (02/21/12 09:30 AM)
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610091 - 02/21/12 02:29 PM (12 years, 9 months ago) |
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Broken up light periods can cause stress, irregular flowering. And 16 hours is a little low for vegetative period, 18 hours of ON time should be your minimum.
If your running an HPS or MH then your already getting UV light and infrared being thrown out, so that really isn't an issue.
I'm not really sure why your asking about the different nanometers, unless your thinking about doing LED where able to actually target those. From the small amount of research I've done it looks like the optimal is
"the proportion of twelve red 660 nm LEDs, plus six orange 612 nm LEDs and one blue 470 nm LED was optimal".
Not sure if these were the answers your looking for, hope it helped though.
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Dude she isn't as young as she use to be.
-niteowl
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal 
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I would think the "optimal" spectrum for indoor cultivation would be the one that most closely mimics the sun's output from far IR to Gamma. Millions of years of evolution has adapted the plant to function perfectly under those conditions, so anything else could be said to be subpar.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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True, but you know were talking about indoor growing. How awesome would it be to just be able to bottle up a little bit o sun and keep it in my basement. Alas HPS will have to do with me for now.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Thank you for your answers.
I was thinking about LED and specific light colors, blue and red being the most common ones. I thought orange wasn't necessary, though it probably is.
I concur on thinking that nothing can beat sun, but the green part of the visible spectrum is pretty useless since plants don't absorb it, hence you're "wasting" watts on that portion, and maybe on UV and IR too if plants don't need them.
Would salvia grow faster on a 24/0 schedule? Or does it need some recovery time?
Thank you
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610107 - 02/21/12 04:22 PM (12 years, 9 months ago) |
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Sorry man. I don't really know anything about growing salvia. I like to give plants, even marijuana, a night cycle.
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Dude she isn't as young as she use to be.
-niteowl
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 bm90191
New To Growery
Registered: 02/05/12
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Last seen: 11 years, 2 months
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Quote:
hawksapprentice said:
True, but you know were talking about indoor growing. How awesome would it be to just be able to bottle up a little bit o sun and keep it in my basement. Alas HPS will have to do with me for now.
I think the closest thing to that are those huge greenhouses they have in Cali where they supplement sunlight with HPS's, probably grows some superrr dank nug. They have big tarps to cover the plants to manipulate the lighting conditions if the sun starts setting later and later during flowering so they can keep the 12/12 cycle. Definitely a super cool idea combining indoor and outdoor growing. I think the closest thing a home grower could get to something like that would be building their flowering room under skylights if they have them. You would need a tarp or something to cover them if the sun starts setting later to keep your 12-12 cycle. Wonder if anyone has tried that and what their results were compared to just HID lighting, hmmm?
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phrostbyte
Hydro Grower
Registered: 09/15/11
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Last seen: 7 years, 11 months
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Re: lighting question [Re: double]
#610140 - 02/21/12 08:41 PM (12 years, 9 months ago) |
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Quote:
double said:
Thank you for your answers.
Would salvia grow faster on a 24/0 schedule? Or does it need some recovery time?
Thank you
from what i have read salvia, like marijuana does not NEED a dark cycle. IMO these types of plants grow faster under 24/0 light.
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double
Diesel
Registered: 02/12/11
Posts: 207
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Re: lighting question [Re: phrostbyte]
#610178 - 02/22/12 05:59 AM (12 years, 9 months ago) |
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Would giving good quality light during night hours, then supplement a minimum/treshold mellower light for say a hour or two, then put out under the sun, work with less stressing?
like lights on 11 p.m. - 6 a.m. then 1 hour dim lights, then outside.
or replacing that hour of dim lights by putting outside, though at that hour the sun won't be that bright.
Thank you
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610195 - 02/22/12 11:52 AM (12 years, 9 months ago) |
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Just don't dim the lights.....
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Thanks for your reply.
So I guess that it's either run lights continuosly or screw your plants and stress them?
Are there no intermediate solutions, like the one of using a dim light between the appropriate indoor lighting and the outdoor natural light as I suggested? 
Thank you
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610203 - 02/22/12 03:33 PM (12 years, 9 months ago) |
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Well I'm trying to figure out why you just don't keep them in full light until you bring them outside. I mean dimming wouldn't be too horrible for them. I just don't get why it's necessary.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Quote:
hawksapprentice said:
Well I'm trying to figure out why you just don't keep them in full light until you bring them outside. I mean dimming wouldn't be too horrible for them. I just don't get why it's necessary.
say it's for energy saving, when you can get electricity off some sources unnoticed at certain hours, while you can't at some others.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610223 - 02/22/12 06:04 PM (12 years, 9 months ago) |
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Okay, I wont press any further then. It'll be okay to dim it for an hour plus a little.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Quote:
hawksapprentice said:
Okay, I wont press any further then. It'll be okay to dim it for an hour plus a little.
Thank you. Another question, would the plants notice 5 minutes off lights?
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phrostbyte
Hydro Grower
Registered: 09/15/11
Posts: 475
Last seen: 7 years, 11 months
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Re: lighting question [Re: double]
#610226 - 02/22/12 06:18 PM (12 years, 9 months ago) |
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Quote:
double said:
Quote:
hawksapprentice said:
Okay, I wont press any further then. It'll be okay to dim it for an hour plus a little.
Thank you. Another question, would the plants notice 5 minutes off lights?
not really
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double
Diesel
Registered: 02/12/11
Posts: 207
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Re: lighting question [Re: phrostbyte]
#610227 - 02/22/12 06:24 PM (12 years, 9 months ago) |
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Quote:
phrostbyte said:
Quote:
double said:
Quote:
hawksapprentice said:
Okay, I wont press any further then. It'll be okay to dim it for an hour plus a little.
Thank you. Another question, would the plants notice 5 minutes off lights?
not really
I guess the opposite would be true for flowering though, getting those 5 mins of light in the dark cycle, right?
How much time do you think they can break the light cycle going unnoticed? 10mins? 20?
Thank you
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: phrostbyte]
#610228 - 02/22/12 06:24 PM (12 years, 9 months ago) |
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What he said.
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Dude she isn't as young as she use to be.
-niteowl
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phrostbyte
Hydro Grower
Registered: 09/15/11
Posts: 475
Last seen: 7 years, 11 months
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Re: lighting question [Re: double]
#610243 - 02/22/12 08:24 PM (12 years, 9 months ago) |
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Quote:
double said:
How much time do you think they can break the light cycle going unnoticed? 10mins? 20?
Thank you
well I have had to turn on a light during the dark period for a few mins here and there. Not to mention looking around with an led flashlight. Never had any negative affects that I noticed really. If it doesn't happen constantly I don't think its a really big deal for 5 - 10 mins.
If you need to do things in the dark you can always put a green bulb in the grow room to use in the dark period. Plants can't use green light and it does not affect them.
http://www.homedepot.com/h_d1/N-5yc1v/R-100573566/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=green%20light%20bulb&storeId=10051
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double
Diesel
Registered: 02/12/11
Posts: 207
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Re: lighting question [Re: phrostbyte]
#610298 - 02/23/12 09:27 AM (12 years, 9 months ago) |
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Thank you for your replies.
Could salvia be grown along with cannabis under the same red & blue lights, if they don't give out too much heat? Or should it be shaded somehow?
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610299 - 02/23/12 09:29 AM (12 years, 9 months ago) |
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Oh I think it will be just fine to grow it along side. No issues there man.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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So does proper-wavelength make the difference over regular lights which give off a lot of heat?
Can plants known to be half-shade lovers be grown along with full sun lovers?
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal
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Re: lighting question [Re: double]
#610302 - 02/23/12 09:33 AM (12 years, 9 months ago) |
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Heat is a wavelength of light. IR and Far-IR.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610304 - 02/23/12 09:35 AM (12 years, 9 months ago) |
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In a setting like LEDS they will do just fine. And I'm not really sure about the shade loving question. But if you just set it off to the side it will probably be just fine.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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I meant that some plants thrive in full sun while other are adapted to shaded locations. But yeah I got your point of having them get some side/reflected light instead of centering them, thank you
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#610307 - 02/23/12 09:41 AM (12 years, 9 months ago) |
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Yup yup.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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 @ you both.
I'm puzzled by reading that blue light mainly helps vegging and seeing led lamps made of mostly red lights, in a 1:6 ratio or something like that.
since leds do poor at flowering (which to my knownledge requires red and far-red wavelengths, along with UVB for increasing resin production) while they're sufficient for vegging, why not just make lights made up of only blue leds?
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal
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Re: lighting question [Re: double]
#610309 - 02/23/12 09:52 AM (12 years, 9 months ago) |
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The reason plants prefer a blue spectrum for vegging and red-shifted light for flowering is an evolutionary by-product. During the spring time (in the northern hemisphere) the planet is literally moving towards the sun, which by way of the Doppler Effect "compresses" the electromagnetic waves emitted by the sun and causes all the light to shift slightly more towards the blue spectrum. At the summer solstice (which is coincidentally the moment that the days start getting shorter as well) the earth passes it's closest point and begins to move away from the sun again. Once again, Doppler Effect, or Red-Shift, takes over and "stretch" the light ever so slightly towards the longer wavelengths.
Plants only "prefer" those wavelengths because they're used to them from thousands of years of evolution. You can mess with it and not be very detrimental in my experience. I've flowered with blue bulbs and gotten great results, and I've vegged under HPS without any issues as well.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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I grow with HPS through my whole grow. Mainly because I'm lazy and don't want to have to remove the glass and switch the bulbs etc.
But I get great results with that.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Quote:
Harry_Ba11sach said:
The reason plants prefer a blue spectrum for vegging and red-shifted light for flowering is an evolutionary by-product. During the spring time (in the northern hemisphere) the planet is literally moving towards the sun, which by way of the Doppler Effect "compresses" the electromagnetic waves emitted by the sun and causes all the light to shift slightly more towards the blue spectrum. At the summer solstice (which is coincidentally the moment that the days start getting shorter as well) the earth passes it's closest point and begins to move away from the sun again. Once again, Doppler Effect, or Red-Shift, takes over and "stretch" the light ever so slightly towards the longer wavelengths.
Plants only "prefer" those wavelengths because they're used to them from thousands of years of evolution. You can mess with it and not be very detrimental in my experience. I've flowered with blue bulbs and gotten great results, and I've vegged under HPS without any issues as well.
So would, watt for watt, be more efficient red 660nm or blue 460nm light? Since leds perform acceptably only at vegging, one may go with using only one wavalength instead of two, if this makes an efficiency difference for the current used
I'd hate to use a commercial red/blue 6:1 and get poorer results than getting a completely blue led panel.
Thank you
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal
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Re: lighting question [Re: double]
#610319 - 02/23/12 11:37 AM (12 years, 9 months ago) |
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The MOST effective light would be hitting every single peak on this graph, at respective intensities to the size of the peak. 
only ONE wavelength is never going to be the best. Plants need a blend because there are multiple photosynthetic pigments.
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double
Diesel
Registered: 02/12/11
Posts: 207
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Thanks for your reply, that's the kind of answer I was expecting
By looking at the graph I also see how using only the highest peaks (660 and 460nm) wavelengths light makers make a compromise on efficiency/cost
Only reason I can guess by logic on such a big difference in red/blue as seen in lights using a 6:1 ratio is that plants have way less chlorophyll a than chlorophyll b 
Thanks again
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bm90191
New To Growery
Registered: 02/05/12
Posts: 155
Last seen: 11 years, 2 months
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Quote:
Harry_Ba11sach said:
The reason plants prefer a blue spectrum for vegging and red-shifted light for flowering is an evolutionary by-product. During the spring time (in the northern hemisphere) the planet is literally moving towards the sun, which by way of the Doppler Effect "compresses" the electromagnetic waves emitted by the sun and causes all the light to shift slightly more towards the blue spectrum. At the summer solstice (which is coincidentally the moment that the days start getting shorter as well) the earth passes it's closest point and begins to move away from the sun again. Once again, Doppler Effect, or Red-Shift, takes over and "stretch" the light ever so slightly towards the longer wavelengths.
Plants only "prefer" those wavelengths because they're used to them from thousands of years of evolution. You can mess with it and not be very detrimental in my experience. I've flowered with blue bulbs and gotten great results, and I've vegged under HPS without any issues as well.
Yup learned about this in astronomy, the wavelength of the suns light is blue shifted as we are moving towards the sun in the summer months and red-shifted when we're moving away from the sun in the fall. I didn't even think of that harry, I thought it had more to do with Earth's tilt on it's axis which, as we all know, is what causes season changes. I never thought that doppler effect we learned about in astro for gaging distance and directions of stars applied to how cannabis plants respond to the sunslight..thats super interesting guess you learn something new every day! lol
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: bm90191]
#610357 - 02/23/12 05:38 PM (12 years, 9 months ago) |
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I thought it was the axis as well. But I haven't really taken any classes on this subject.
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Dude she isn't as young as she use to be.
-niteowl
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal
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The axial tilt influences the intensity of the sunlight hitting the surface and therefore how much energy is absorbed and reradiated as heat into the atmosphere (causing the seasons). It doesn't affect the wavelength shift of incident light.
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bm90191
New To Growery
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Yeah its confusing because the northern hemisphere is actually closer to the sun in the fall/winter but like harry said its the doppler effect that has caused cannabis to evolve in accordance with the blue and red shifts
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal
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Re: lighting question [Re: bm90191]
#610373 - 02/23/12 06:39 PM (12 years, 9 months ago) |
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Quote:
bm90191 said:
Yeah its confusing because the northern hemisphere is actually closer to the sun in the fall/winter but like harry said its the doppler effect that has caused cannabis to evolve in accordance with the blue and red shifts
Only in the southern hemisphere.
In the northern hemisphere then our axial tilt aligns with the solstice movement shifts. ie, in the winter when we're tilted away we're also at our farthest point. In the summer when we're pointed towards it is our closest point.
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double
Diesel
Registered: 02/12/11
Posts: 207
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would placing plants close to LED lights emitting red/blue wavelengths ever produce burns or issues?
I am asking since they don't emit anything else other than their wavelengths and some heat (which goes up and is taken care of, though) due to joule effect, so virtually no IR radiation could the plants.
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Stoneth
D.I.L.L.I.G.A.F.
Registered: 10/06/08
Posts: 25,052
Loc: No where ville, USA
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Re: lighting question [Re: double]
#616475 - 04/05/12 09:58 PM (12 years, 8 months ago) |
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I've seen sunburn and even bleaching as a result of running the lights to close to the canopy.
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double
Diesel
Registered: 02/12/11
Posts: 207
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Re: lighting question [Re: Stoneth]
#616500 - 04/06/12 04:34 AM (12 years, 8 months ago) |
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Quote:
Stoneth said:
I've seen sunburn and even bleaching as a result of running the lights to close to the canopy.
are you talking about LED lights emitting no UV or IR?
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Stoneth
D.I.L.L.I.G.A.F.
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Re: lighting question [Re: double]
#616537 - 04/06/12 12:00 PM (12 years, 8 months ago) |
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Yes sir.
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double
Diesel
Registered: 02/12/11
Posts: 207
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Re: lighting question [Re: Stoneth]
#616544 - 04/06/12 01:29 PM (12 years, 8 months ago) |
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Quote:
Stoneth said:
Yes sir.
just wanted to be sure, thank you. how far should be the lights put away according to their wattage? I expect them to be able being put closer because they emit way less heat (IR) than MH or HPS.
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Stoneth
D.I.L.L.I.G.A.F.
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Loc: No where ville, USA
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Re: lighting question [Re: double]
#616545 - 04/06/12 01:41 PM (12 years, 8 months ago) |
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Personally I like 2 to 6 inches, tho wattage is a factor here with higher wattage units 300+ 10 to 12, I'm willing to accept a little bleaching. But I'm always watching for any signs of burns.
In my experience a little bleaching doesn't hurt anything, tho to much bleaching tends to slow growth a little and causes a hashish like taste.
Burns of any kind are just bad imo.
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double
Diesel
Registered: 02/12/11
Posts: 207
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Re: lighting question [Re: Stoneth]
#616862 - 04/08/12 04:43 AM (12 years, 8 months ago) |
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thank you 
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GreenShaman
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Re: lighting question [Re: double]
#617895 - 04/12/12 09:54 PM (12 years, 8 months ago) |
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hmm interesting 
You can keep a vegetative or newborn plant under lights 24/7? How can they photosynthesize? I thought..... only thought... i may be wrong, that vegetative plants can go from 16-18 hours. I forgot about flowering.... Oh and how does the irregular lighting patterns effect the plant?
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: GreenShaman]
#617901 - 04/12/12 10:08 PM (12 years, 8 months ago) |
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How irregular light patterns affect the plant depends on what stage of growth they are in. If it is flowering it can stress you're plant out and cause it to hermie out.
A few plants out there do not need a dark cycle during growth. Marijuana is one of them. Now obviously the light amount does need to be reduced to 12/12 to flower, unlike some plants that will flower regardless.
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Dude she isn't as young as she use to be.
-niteowl
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GreenShaman
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Quote:
hawksapprentice said:
How irregular light patterns affect the plant depends on what stage of growth they are in. If it is flowering it can stress you're plant out and cause it to hermie out.
A few plants out there do not need a dark cycle during growth. Marijuana is one of them. Now obviously the light amount does need to be reduced to 12/12 to flower, unlike some plants that will flower regardless.
Quote:
hawksapprentice said:
How irregular light patterns affect the plant depends on what stage of growth they are in. If it is flowering it can stress you're plant out and cause it to hermie out.
A few plants out there do not need a dark cycle during growth. Marijuana is one of them. Now obviously the light amount does need to be reduced to 12/12 to flower, unlike some plants that will flower regardless.
Thank you very much! I spoke to a tomato farmer and he was giving me the 18/6 bullshit routine... So very flexible lighting requirements until flowering.... sounds like an easy plant to grow. :thumb up:
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: GreenShaman]
#618035 - 04/13/12 02:42 PM (12 years, 8 months ago) |
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But you should stick to 1 light cycle during veg. Don't be switching between 18/6 to 24/0. Pick 1 and stick with it.
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Dude she isn't as young as she use to be.
-niteowl
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GreenShaman
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why?...eep
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: GreenShaman]
#618075 - 04/13/12 07:33 PM (12 years, 8 months ago) |
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Can stress them out. Shifting it once or twice is no big deal. But you shouldn't be doing it a lot. It's way more critical to keep consistent light periods during flowering than vegetative.
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Dude she isn't as young as she use to be.
-niteowl
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GreenShaman
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this is getting off topic but how about increasing the ratio so it's longer but consistent?
let's say 20/2 would that be stress free for ms. mary jane?
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: GreenShaman]
#618082 - 04/13/12 07:46 PM (12 years, 8 months ago) |
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Quote:
GreenShaman said:
this is getting off topic but how about increasing the ratio so it's longer but consistent?
let's say 20/2 would that be stress free for ms. mary jane?
I'm confused.
What I was getting at was that having your light periods jump around from different on/off cycles can be stressful.
Any steady light schedule is stress free.
20/4 would work just fine. I'm assuming that's what you meant.
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Dude she isn't as young as she use to be.
-niteowl
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GreenShaman
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Quote:
hawksapprentice said:
Quote:
GreenShaman said:
this is getting off topic but how about increasing the ratio so it's longer but consistent?
let's say 20/2 would that be stress free for ms. mary jane?
I'm confused.
What I was getting at was that having your light periods jump around from different on/off cycles can be stressful.
Any steady light schedule is stress free.
20/4 would work just fine. I'm assuming that's what you meant.
Quote:
hawksapprentice said:
oh yeah! sorry somebody real close to me took a bunch of lortabs and xanax....
Quote:
GreenShaman said:
this is getting off topic but how about increasing the ratio so it's longer but consistent?
let's say 20/2 would that be stress free for ms. mary jane?
I'm confused.
What I was getting at was that having your light periods jump around from different on/off cycles can be stressful.
Any steady light schedule is stress free.
20/4 would work just fine. I'm assuming that's what you meant.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: GreenShaman]
#618087 - 04/13/12 07:52 PM (12 years, 8 months ago) |
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You gotta work on your quoting skills. 
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Dude she isn't as young as she use to be.
-niteowl
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GreenShaman
Stranger
Registered: 04/04/12
Posts: 139
Loc: Pluto
Last seen: 12 years, 3 months
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Quote:
hawksapprentice said:
You gotta work on your quoting skills.
 haw haw, lol again lortabs and xanax... coming down now though 
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: GreenShaman]
#618134 - 04/14/12 02:01 AM (12 years, 8 months ago) |
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And now I'm drunk!!
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Dude she isn't as young as she use to be.
-niteowl
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Blackd0ve420
Registered: 01/26/09
Posts: 160
Last seen: 7 years, 9 months
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Quote:
hawksapprentice said:
How irregular light patterns affect the plant depends on what stage of growth they are in. If it is flowering it can stress you're plant out and cause it to hermie out.
A few plants out there do not need a dark cycle during growth. Marijuana is one of them. Now obviously the light amount does need to be reduced to 12/12 to flower, unlike some plants that will flower regardless.
Autoflowers would be an exception to this correct? They could run 24/0 no problem because of their auto design? 
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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I've heard of them getting funky growth on full 24/0 light. And some wont even flower, even though they are auto flower, on 24/0.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Re: lighting question [Re: Stoneth]
#618156 - 04/14/12 08:48 AM (12 years, 8 months ago) |
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Quote:
Stoneth said:
Personally I like 2 to 6 inches, tho wattage is a factor here with higher wattage units 300+ 10 to 12, I'm willing to accept a little bleaching. But I'm always watching for any signs of burns.
In my experience a little bleaching doesn't hurt anything, tho to much bleaching tends to slow growth a little and causes a hashish like taste.
Burns of any kind are just bad imo.
would complete bleaching (yellow leaves due to too much light) of the apical stem/leaves kill growth on a seedling?
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#618160 - 04/14/12 09:43 AM (12 years, 8 months ago) |
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Usually bleaching ends up being more white than yellow. Are you sure it was bleaching?
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Dude she isn't as young as she use to be.
-niteowl
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Stoneth
D.I.L.L.I.G.A.F.
Registered: 10/06/08
Posts: 25,052
Loc: No where ville, USA
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Bleaching is white or near white at least.
Yellow is your plant telling you there are problems.
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double
Diesel
Registered: 02/12/11
Posts: 207
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Quote:
hawksapprentice said:
Usually bleaching ends up being more white than yellow. Are you sure it was bleaching?
leaves were light green/fine. put them close (1") from a 50w red/blue LED panel for 14 hours and the younger 2-3 sets of leaves, comprised the apical stem, assumed a solid yellow, potato chips-like color.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#618201 - 04/14/12 02:49 PM (12 years, 8 months ago) |
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Pic?
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: double]
#618209 - 04/14/12 03:31 PM (12 years, 8 months ago) |
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I'd say that looks more burnt than bleached.
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Dude she isn't as young as she use to be.
-niteowl
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double
Diesel
Registered: 02/12/11
Posts: 207
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Quote:
hawksapprentice said:
I'd say that looks more burnt than bleached.
I see, thank you 
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Blackd0ve420
Registered: 01/26/09
Posts: 160
Last seen: 7 years, 9 months
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Quote:
hawksapprentice said:
I've heard of them getting funky growth on full 24/0 light. And some wont even flower, even though they are auto flower, on 24/0.
Really? I was under the impression otherwise. I have had mine on 24/0 the whole time. So far so good...I guess we'll see. It'd probably be best now to just keep them on that schedule instead of just switching it over 12/12.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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This is just what I have heard. Experiment and see what happens man.
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Dude she isn't as young as she use to be.
-niteowl
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the man
Registered: 04/20/08
Posts: 825
Last seen: 11 years, 10 months
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ya if they are good autos they flower under 24. all these Ryders out there can be a bit unstable esp people trying to catch the wave(if there still is one) as quick as possible
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Blackd0ve420
Registered: 01/26/09
Posts: 160
Last seen: 7 years, 9 months
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Re: lighting question [Re: the man]
#618312 - 04/15/12 09:23 AM (12 years, 8 months ago) |
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I'll post results of a 24/0 grow then in a separate thread.
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bm90191
New To Growery
Registered: 02/05/12
Posts: 155
Last seen: 11 years, 2 months
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if you try a 24/0 grow at least switch the spectrum between veg and flowering from 6500k to 2700 or lower for flowering. I can vouch for the fact that time is more important than spectrum, I switched my veg lights (6500k) to 12/12 from 18/6 and that initiated the flowering. If its not an autoflowering strain it definitely needs some type of cue to just switch into flower.
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Blackd0ve420
Registered: 01/26/09
Posts: 160
Last seen: 7 years, 9 months
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Re: lighting question [Re: bm90191]
#618366 - 04/15/12 06:33 PM (12 years, 8 months ago) |
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Quote:
bm90191 said:
if you try a 24/0 grow at least switch the spectrum between veg and flowering from 6500k to 2700 or lower for flowering. I can vouch for the fact that time is more important than spectrum, I switched my veg lights (6500k) to 12/12 from 18/6 and that initiated the flowering. If its not an autoflowering strain it definitely needs some type of cue to just switch into flower.
They are autoflowering diseal hybrids.
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bm90191
New To Growery
Registered: 02/05/12
Posts: 155
Last seen: 11 years, 2 months
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That seems like its gonna be harder to control temps I feel like my night cycle gives my room a chance to cool down a bit how do you think your going to go about controlling the temps for your space?
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: bm90191]
#618382 - 04/15/12 06:59 PM (12 years, 8 months ago) |
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I run my lights 24/0 during veg. No heat issues. But then again I use air cooled lights as well as have an air conditioner. But I look at preparing my grow spaces before I start growing these days. Learned my lesson to many times to not prepare the grow space adequately before I start growing.
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Dude she isn't as young as she use to be.
-niteowl
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bm90191
New To Growery
Registered: 02/05/12
Posts: 155
Last seen: 11 years, 2 months
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do you run MH for veg? I know its a hot topic but most growers I know have converted to T5's they say the results are practically identical and with the T5s the plants don't stretch nearly as much because they are like 1.5 inches above the canopies
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: bm90191]
#618384 - 04/15/12 07:10 PM (12 years, 8 months ago) |
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Nope, HPS the whole way through. The strain I have stretches like a mother fucker when it hits 12/12 anyways, that I don't care if it's a little lankier during veg. Which they really aren't anyways.
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Dude she isn't as young as she use to be.
-niteowl
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bm90191
New To Growery
Registered: 02/05/12
Posts: 155
Last seen: 11 years, 2 months
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Yeah i know what u mean i'm still raising my lights 5 weeks into flowering
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Blackd0ve420
Registered: 01/26/09
Posts: 160
Last seen: 7 years, 9 months
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Re: lighting question [Re: bm90191]
#618404 - 04/15/12 08:22 PM (12 years, 8 months ago) |
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Quote:
bm90191 said:
That seems like its gonna be harder to control temps I feel like my night cycle gives my room a chance to cool down a bit how do you think your going to go about controlling the temps for your space?
Don't have any heat problems. CFL's don't put out much heat, one of the reasons I went with them. I also have a couple fans going, and also one I turn on near my mushie box.
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Stoneth
D.I.L.L.I.G.A.F.
Registered: 10/06/08
Posts: 25,052
Loc: No where ville, USA
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Re: lighting question [Re: bm90191]
#618405 - 04/15/12 08:23 PM (12 years, 8 months ago) |
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Quote:
bm90191 said:
do you run MH for veg? I know its a hot topic but most growers I know have converted to T5's they say the results are practically identical and with the T5s the plants don't stretch nearly as much because they are like 1.5 inches above the canopies
I have yet seen a set of T5's grow as well as MH.
And if someone is getting stretching under an MH then they are raising their lights to quickly.
MH in fact creates tighter branch spacing.
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bm90191
New To Growery
Registered: 02/05/12
Posts: 155
Last seen: 11 years, 2 months
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Re: lighting question [Re: Stoneth]
#618408 - 04/15/12 08:29 PM (12 years, 8 months ago) |
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Hydrofarm T5's produce sick results
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: bm90191]
#618411 - 04/15/12 08:30 PM (12 years, 8 months ago) |
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Quote:
bm90191 said:
Hydrofarm T5's produce sick results
For a Floro.
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Dude she isn't as young as she use to be.
-niteowl
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Stoneth
D.I.L.L.I.G.A.F.
Registered: 10/06/08
Posts: 25,052
Loc: No where ville, USA
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I've seen them, and grown with them.
They don't have enough peneration to keep me happy.
HID is the only way for me.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: Stoneth]
#618415 - 04/15/12 08:37 PM (12 years, 8 months ago) |
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HID is always the way for me. Floros only get used for my mothers.
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Dude she isn't as young as she use to be.
-niteowl
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Stoneth
D.I.L.L.I.G.A.F.
Registered: 10/06/08
Posts: 25,052
Loc: No where ville, USA
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I only use cfl's for clones these days.
But that is as far as I'll go with flouro's.
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Hawksresurrection
Registered: 12/04/08
Posts: 13,464
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Re: lighting question [Re: Stoneth]
#618439 - 04/15/12 11:36 PM (12 years, 8 months ago) |
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Well my mother doesn't that much power. I find a shop light gives me more than enough light for them to grow back after being cut. I usually have to trim them back still half way through the grow.
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Dude she isn't as young as she use to be.
-niteowl
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KaptKid
Spaced Pirate
Registered: 04/20/08
Posts: 5,615
Loc: Bright Side of the Sun
Last seen: 1 year, 30 days
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I have a heat problem most of the year(because of where I live). T12's I use for clones and mother's . Put mother's under a T5HO when getting ready to take clones.
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Child of the 60's, Tripping ever sence.
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