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From where?

I would like to have passive heatsink but they are so expensive, hard to give customers a good price. The best price i found to date is 17 euro (inkl shipping and VAT) :/

Better price than i payed ^^ lol

Mouser

Has they started to change colour?

Online, dont have to put that much time really in it. I was thinking 240 euro per light for passive and 200 euro for active heatsinks.

Hi guys! Im going to sell citizen cob kits for extra cash. What price range do you suggest for the following kit? 4x CLU048-1212 3500k 80-90 cri 4x CLU048 holders 1x Meanwell HLG-185-C1400A 2x 24 inches aluminium angle 4x Pre drilled passive pin fin heatsink + wires and outlet

I'm just getting more confused with this research. Both of the helio lamps that made lettuce reddish had lower blue spectrum then 2700k cobs. IF it's blue spectrum that makes lettuce change colour we van never use cobs succesfully in leafy greens. An Idea: Only use far red (660nm) diods...

No

WARNING - it's not the same guy.

Wonder if http://www.cutter.com.au/proddetail.php?prod=cut1500 would help. One or two diods per cob at highest output.

No experience sry.

citizen 1212 5000k :/

Havent try tomatoes but my peppers did not do well under cobs.

Yes it will need a ballast.

Too bad, had high hopes for vegetables with cob led.

Thank you Airwalker!

Hi guys! Which spectrum is better for veg? I can get the 5000k 80 cri CLU046-1212 with 147lm/w or 4000k 90 cri clu046-1212 with only 117lm/w. Is it better to loose a bit on the red spectrum for extra efficiency or get higher cri with more red. I belive 5000k has more photons but not sure...

Anyone ordered clu046-1212 from estoniaelectronic on ebay?

Driver LED trafo 150W, 48-215V, 700mA. Clu046-1212 35v*0,7mA = 24,5w. 6 cobs in serie will be 147w and 35vx6=210v Would this setup work on this driver? Thanks again.