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Thanks for joining in Chronic! From what I have read CFL's, HPS and black lights emit zero usable UVB lighting. MH and reptile lights do however, with any brand 10% HO Reptile light being ideal. So your question shouldn't be one of to add more, but whether to add any. The question of WHEN...

Long time gardener and partaker, but first time cannabis grower. Is this a Pistil? Thanks guys/gals!!!

Pics are a little blurry. Looks to me like either heat stress, lack of water or a combination of both. Have you temp'ed the air just above the tip of your tallest plant? I'm betting it's in the upper 80's to mid 90's which is too high. And your soil does look dry as well, but again, hard to...

From the documentation I have reviewed over the past few weeks, I do not continue to question whether or not UVB rays increase THC production, or more specifically trichome production... It's a fact, they do. At the absolute minimum, a cannabis plant that is lacking the appropriate amount of...

If anyone is still following, I found an interesting read on http://www.greenmanspage.com/guides/thc.html (5) "Pate (1983) indicated that in areas of high ultraviolet radiation exposure, the UVB (280-320 nm) absorption properties of THC may have conferred an evolutionary advantage to Cannabis...

Thanks a ton Nugget!! I do appreciate your help and I'll fire one up in your honor in a few months!!

Anyone else have any experience with UVB?

Also, when did you initiate the UVB? Was it from start of flowering through harvest or any variation?

Thanks for the quick reply Nugget!! You mention CFL... What's your current mix CFL's to UVB? How bigs your grow area and grow itself? I'm trying to avoid the burning issues you mentioned. I'm still in Veg but going flower next week. 3 plants in a small closet with 6 40w 2700k and 2x 26w...

So there are a few recent and very good discussions on the boards by some grow artisans regarding UVB lighting but no definitive conclussions from what I can find. I figure, what the hell, and just ordered one from Amazon as an addition to my flowering gear. My problem is that I am currently on...

GOOD CALL Anonymiss! Leaves have opened back up after a nice soaking. I moved the light source up an inch as well. Better to be safe than without smoke I suppose. Thanks again guys!

Thank you both a ton!! You know just how good that is to hear!! Happy growing!!

Hey all. First of all, thanks to ALL posters on the site. I'm on week 4 of my first grow ever and if it weren't for all of you, I wouldn't have known where to start. So give yourself kudos! This little baby turned 4 weeks old today. I transplanted "her" 3 days ago into a mix of: 2...