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If the driver HLG-185H-C1050C puts 1150 +- are you sure fits well with 5 CXB3590 36v cause its seems to be 207w or so... If that works seems like awesome combo efficiency/Cost.

if you go for the 36v you get beter efficiency (64%) more light and better spread and if you go for the 72v will be cheap but you loose efficiency (56.3)

If you look at gavitas DE 750w 1500ppf 550$ or 1000w 2100ppf for 680$...

Its something around 740 umol for the total área if im not wrong.

i finally go with 3500k +some 660nm im going to do a face to face with only 3000k cobs for the next mounth in 2 80x80 tents

GOOD INFO BRO! im also very interested cause i have also 2 80x80 tents to cover and i alredy have 4 cxb3590 and soome veros for veg

if you wait for the new 240h driver from meanwell you can use 5 cxb3590 at 48.85w for 960ppfd!!

Money shot!

For 3 cobs you must use 1400ma model for 36v cobs or 72v and 700ma

64% efficiency, not 60 and like 1050 umols for the 56.3 option and 960 for the 49%, think also 1000 umols max and I like the idea of max a small space.

Well if you want efficiency go for 4 cobs like bicit say, but remember it's only 50w more consumption and about 15% more intensity also cheap and easy. Drivers HLG-120H-C1050A for 2 72v cobs HLG-120h-C700a for 3 72v cobs

U can go with 2 at 75w each 49% efficiency 3 at 48,8w - 56.3% efficiency, I'll go with 2 and you almost max the intensity 940-950 ppfd 1050ppfd for the 56.3%, go with the 72v for 2, and 36v for 3

At least for me in my sativas/hybrids it does maybe indicas grow well

Wow !!Where you can buy DD now?

3000k only for flower, in veg produce a lot of stretch for me

+1 4000k for the whole circle

Looking in that direction now, 4 reds/2 Blues or only reds... Going to check the monos options to max V and W @alesh you know the umols/j of royal blue monos? Thx

Cxb3590 at 700 should be at 32.72v each x 8 = 261.76 so if my maths are ok I have like 26.24v

8 4000k and some reds sound kick ass too but what a price! For the 4000k... What about this red seems to be 650-670 http://shop.stevesleds.com/Philips-Luxeon-ES-Deep-Red-3-Watt-LEDs-RARE-Version-8794102435.htm

I'm going to go with 660 monos, which is the best one nowadays?