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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
Posts: 155
Last seen: 11 years, 1 month
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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
Posts: 475
Last seen: 7 years, 10 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.
--------------------
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, 10 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, 10 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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