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models definitely aggregate errors. remember the bridgelux v29 calculator that gave over 300 lm/W for low currents?

throw a nice flat piece of copper under those bad boys. they also make 2 x 1 x 1/16" extrusions

i agree to an extent but i think all phosphor leds are a little more similar to each other (at least in the 2700k-5000k ranges we usually deal with). i get a lot of people obsessing over 3000 vs 3500k when the differences are very subtle. i think 3500k 90 is my favorite though. plenty of flower...

that sounds odd. maybe in an open area flat white paint is over 90% reflective. And many people use better than that for their walls. of course getting the light on the plants is of primary importance Kinda reminds me of when cree's "reference design" (which was ok but not all that) claimed to...

my main metric i should say. i run in tenets and dont use reflectors on my cobs. mid power diodes throw light at same angle

near the top of the list of available options my metric is efficiency. the "features" of the optic are useless to me if the underlying efficiency isnt there

cant even see how optic 6 is on anybodys list if you understand efficiency at all its not even in the discussion

not sure how to answer the poll Led only Both Led and Hps should be 1. This LED only 2. This LED and HPS 3. high quality LED

theres a famous saying "more is lost by indecision than wrong decision"

would think that would be correctable by lowering humidity and insulating lines

no i havent yet

QB288 V2s and heatsinks up on site (official HLG product of course) http://cobkits.com/product-category/pcbs/quantum-boards/ combos with slate 2 doubles will be up later today

QB288 V2s and heatsinks up on site - these are official HLG boards of course http://cobkits.com/product-category/pcbs/quantum-boards/ combos with slate 2 doubles will be up later today

QB288 V2s and heatsinks up on site http://cobkits.com/product-category/pcbs/quantum-boards/ combos with slate 2 doubles will be up later today

j/k i dont sell substandard lights at any price

i have an extra one of those i can sell you for $3200

assuming they are ideals your meter leads wont fit in there. and if you stick a second wire in there you cant use the paperclip trick to release either so it will be there for good. id use a paperclip in second hole to eject the first wire and just rewire them this is another reason i like...

measured where? thats expected right off the driver but tells you nothing about the cob/holder connecitons

not gonna work (well, if at all) with a driver designed for series. might be best to review the fundamentals this also would not work as it is below minimum driver voltage unlikely. bad connection or one bad cob more likely the drive should light up 2 at a time in series try taht and see if...

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