further proving your very low experience level in growing.im sorry man but you just dig yourself deeper and deeper into the bullshit hole every time you post.you keep on trying to bs your way around inverse square law and that silly word you use"penetration" and then show me one lil nug that looks like you used a dirty polaroid from 1989 to take the pics .nobodys buying your web of lies.that kind of talk may work in the newbie section but these led guys are a pretty bright group lol.i been growing for going on 30 years,worked in and around 800 acre farms with greenhouses yet in the past year just reading this one section of this site i have learned more than i could have imagined.you need to open your mind if you want to take it to the next level.that means your grow,your knowledge of lighting,and your picture taking skillz.peace im done with you,we all know its like talkin to a brick wall and your just not very credible.and you still havent answered one simple question about growing under double ended lamps lol.i can say i have exp in every type of lighting except plasma and induction,including many years of outdoor way before it was legal anywhere in this country