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 newbie2shoes
Stranger
Registered: 12/02/14
Posts: 51
Last seen: 7 years, 9 months
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 How much LED light would be needed? 
#823250 - 01/30/17 05:29 PM (7 years, 10 months ago) |
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I have 2 tents and a couple led lights and was wondering the ballpark wattage. Im working with close to 200w total. 1 tent being 9sqft the other being 4.5sqft.
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 phychotron
Medicated
Registered: 02/17/11
Posts: 1,995
Loc: Earth (mostly) 
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Re: How much LED light would be needed? [Re: newbie2shoes]
#823258 - 01/30/17 09:14 PM (7 years, 10 months ago) |
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200w in a 9sq-ft area is only 22w/sq-ft. Kinda on the low side. 200w in a 4.5sq-ft area is 45w/sq-ft, which is more appropriate. 35-50w/sq-ft is about average.
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Any help given is for educational purposes only. Its your responsibility not to break any applicable laws
 Bamboo Bongs I make | Perfect Dry and Cure | Grapegod under LED
“Human beings, vegetables, or cosmic dust, we all dance to a mysterious tune intoned in the distance by an invisible player.” ~ Albert Einstein
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TrueHerbCrystal
Uncertified Oregrowian
 
Registered: 02/07/09
Posts: 1,352
Loc: Emerald City
Last seen: 6 years, 2 months
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Re: How much LED light would be needed? [Re: phychotron]
#823264 - 01/30/17 10:50 PM (7 years, 10 months ago) |
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so basically one 200 watt light per one plant?
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phychotron
Medicated
Registered: 02/17/11
Posts: 1,995
Loc: Earth (mostly)
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Re: How much LED light would be needed? [Re: TrueHerbCrystal] 1
#823276 - 01/31/17 01:18 AM (7 years, 10 months ago) |
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That sounds about right.
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Any help given is for educational purposes only. Its your responsibility not to break any applicable laws
Bamboo Bongs I make | Perfect Dry and Cure | Grapegod under LED
“Human beings, vegetables, or cosmic dust, we all dance to a mysterious tune intoned in the distance by an invisible player.” ~ Albert Einstein
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TrueHerbCrystal
Uncertified Oregrowian
Registered: 02/07/09
Posts: 1,352
Loc: Emerald City
Last seen: 6 years, 2 months
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Re: How much LED light would be needed? [Re: phychotron]
#823282 - 01/31/17 03:41 AM (7 years, 10 months ago) |
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Cool thanks 
My first grow was about 200 CFL watts during flowering and it looked like just enough.
But i didnt finish that grow so im not sure if it would have been enough in the end.
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newbie2shoes
Stranger
Registered: 12/02/14
Posts: 51
Last seen: 7 years, 9 months
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Re: How much LED light would be needed? [Re: TrueHerbCrystal]
#823306 - 01/31/17 11:21 AM (7 years, 10 months ago) |
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Keep in mind the wattage draw is the number to go off of.
I have:
Kessil H380 (switchable veg/bloom)
Current marine led light (2 way dimmable 6500k/actinic, blue heavy)
Finnex (finnex full spectrum aquarium light)
And a screw in led reef bulb (from my old nano saltwater tank)
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funky
Smoker
Registered: 10/13/14
Posts: 195
Last seen: 3 years, 2 months
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Re: How much LED light would be needed? [Re: newbie2shoes]
#823342 - 02/01/17 05:12 AM (7 years, 10 months ago) |
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I'm not real familiar with many store bought brands, but I've been using leds over a reef tank for years. I have a reef breeders photon 48 fixture (220 watts) with 102 3 watt diodes an after I changed most out for plant friendly colors with 90° optics it will only put out 23k lux at 12 inches. Good for vegging but not for flower imo.
I have 2 citizen clu048 1818 chips running off a meanwell hlg-120h-48a drawing 150 watts from the wall, according to the citizen calculator I'm getting 154 lumens a watt
2.17 umol/j . I'm getting 25k lux 24 inches below the fixture and a bigger foot print than the other fixture. Watts is one way to look at it but lm/w is very important too. I'm no expert on the subject and I'm in the middle of my first grow in a decade, so far from experienced. But there are folks out there pulling off grows with way less too. Good luck an enjoy the hobby.
Edited to add umol/j
Edited by funky (02/01/17 05:35 AM)
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