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yeah,but wouldnt that give me much more heat and lower efficiency? i wouldnt change those drivers I already have and all those stuff on which I already spent my money.

CLL050-1825A1-303M1A2 http://www.ebay.com/itm/CITIZEN-POWER-LED-82-4W-3000K-7995-lm-54-9V-CLL050-1825A1-303M1A2-1-Stuck-/361342073807?hash=item5421aa7bcf:g:878AAOSwMmBVphev what about theese? are they good? i have 2x hlg mean well 185c..1050a and 10x citizen clue 048 1212.. 3500k each cob...

Experts on spot :-D Very nice thread

Well,one aggain..i have grow tent 120x120x200 cm.. Winters are cold,summers are hot :-D was planning to use 4 led panels for that space Running at 150-180w each. Parts: 4 draivers HLG-185H-C1050A. 20 heat sinks 125x60x25 mm 20 fans 60mm for each cob,each heat sinks 20 cobs citizen 1212,clue...

I think its best to see it by yourself.. To try reflectors/lens..and to try running cobs bare.. I will build two panes with some kind of reflectors..and the other two without..so i guess i wil see the differance. But i think that you people just convinced me that running cobs bare isnt a big...

Cob clue 048 is around 30mmx30mm..i guess 78mm lens is enough :-) Thank you once again

I found some 100mm and 78mm lenses on alibaba.. 90degree angle.. Should i take 100mm ones for cob 1212 clue 048,or it doesnt matter..? Thank you master yoda :-D

Hello, i have 4x 180w cob panels. citizen 1212 clue 048 running at 40-50w each. And grow space 120x120x200 cm. Do you recomand me some lenses or reflectors..which one is better? I have possibility to buy reflectors and holders 60degree angle. And other option isglass lenses 90 degree angle...