DemonTrich
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I’d love to use QBs for my next seedling/veg stage and save this light for my flower...ima take a look at ur setup homie, thanks!Yeah, I don't really know if that is light burn but looks more like nutrient burn. However with COBs spaced that close together why the hell would they use lenses, you just get a bunch of hot spots of intensity. I just posted a low cost entry level veg system that you can build for less than $200 and maybe even as low as $78. They are based on quantum QB120 boards. Have a look. I have seedlings and teenagers under it and I can get real close to the plants and they never burn. With my COB's and no lenses or reflectors I can get flowering plants a few inches away and no bleaching just real fast development. They seem to like being close to the light and the intensity is still less than it is on a sunny day at noon so they seem to be able to take all I can give them.
Link to my thred on QB120's: https://www.thcfarmer.com/community/threads/inexpensive-led-entry-point-qb120.95337/
Below is my veg tent. Lights are not real close here because I want a little more spread of the light right now but have run them as close as 3-4". In the flower room I run the COBs real close when the plants are asking for more light. These cost me $38 each to build and they put out 60 watts true power which is equivalent to about 80 watts HID!
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I like work lolLight burn would be white
Nute burn is what your seedlings are showing. And for 2 weeks, those look ok for growth. Patients. You have 4-6 weeks before flip, then another 2 months to harvest. 7 days to dry, 3 weeks to cure if you desire to.
May want to grab a case of snickers. Perpetual is where it's at! But constant work.
I’d love to use QBs for my next seedling/veg stage and save this light for my flower...ima take a look at ur setup homie, thanks!
Led will lack penetration. Really I’ve come to penetration meaning about nothing. Cause I don’t care if you got 20000w of hid after 2 or 3 sets of leaves get in way there is no light getting in.Thank you yes it does answer alot and I see how the extra diffusion might weeken the intensity and thats what im after right now I believe I lack penetration and intensity may I ask whT cobs you use??? And like what sorta ave per watt return are you getting. Seems the more i read the less I know. I reAlly would love just some unbiased experiential advice
From a physics standpoint how does a photon from one light source have more or less penetration than another?
Does a single HID bulb have more "penetration" than a bunch of LEDs spread over the grow canopy? Doesn't the diversity of angle (of the light beams) penetrate better when there are more of them spread out over an area? The geometry says it does. This idea of penetration is a myth propagated by people trying to sell lighting.
BTW, I am using LED COBs and the lower bud sites (not larf but lower ones that usually get blocked by the main colas and leaves) on my plants are developing so much better than in past 1k HPS grows. I believe it is because of the angle of the light coming from 12 places instead of basically one. The light coming from many points at many angles means the lower buds are getting more light. Not ideal light but better and a lot of these buds that would normally go in the trim pile for RSO or dry ice extraction are actually usable buds. This is what I mean by "diversity of angle".
Dee
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