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in theory lets say we had a 4x4 with 16 cobs @ 1050ma giving ~980ppfd ABOVE one tray, pulling a total of ~588w in the other tray lets say we had a 4x4 with 16 cobs @ 700ma giving ~700ppfd and pulling ~392w, but lets say we add two cobs on each side of the tray, giving light to the lower...

i keep my volcano @ 393 because i remember reading an article about how "significant levels of XXX carcinogenic substance presented itself @ 394* and above" im pretty sure it was a scholarly article from harvard med school using the volcano specifically, although i've tried to find it again...

i am using r-tech on my walls and ceiling but what do you guys do about the floor? i used the 6mil poly as a vapor layer around the entire room, floor included, but is there a relatively cheap easy way to throw some flooring down on top of the 6mil so i dont keep ripping it?

is there a lens on these reflectors? I want to foliar spray without concern

@Greengenes707 ok so new thought... google sacred geometry.... you will find 6 circles around 1 circle, all with equal diameter touching each other. something like this.... ...OO ..OOO ...OO this is 7 total cobs. over 9 sq ft. @ 1050 ma on a single HLG-240H-C1050B pls excuse the extra...

@Greengenes707 ok so my math ends up pretty close somehow... ill just say i tax'ed it a little more :).... so am I correct in assuming that the reason the 700ma is pulling only ~33v is because of driver efficiency? (.94 x 35 = 32.9?) so if driver efficiency goes down to lets say 85% with 6...

@Greengenes707 well I do my math off one cob per sq ft and running 9 of them over a 3x3 on a single hlg-240h-c700b I get about 702 PPFD correct? is that calculating in the loss for the driver efficiency and optics? dont ask me how but the way I do the math is .7 x 35 x .64 x 44.78 = 702 I...

@BOBBY_G so when you mean efficient, it would still be @ 64% efficiency as for calculating ppfd? is driver efficiency important?

hey my final setup would be 9 cobs @ 700ma over a 3x3 so I want to buy the hlg-240h-c700b and 9 cxb3590s on it but I am going to do three separate bars. my question is can i buy the 240h and only 3 cxb3590s and run it @ 700ma each? and then later buy the other 2 bars and upgrade? or will it...

@Airwalker16 why does it look like there is light coming out between where your reflectors meet your heatsink?

yeah I've looked at those and it doesn't make sense to me, which is why i asked. for example when i look at the line of 700ma in the first chart you posted (the only one that relates to my question) when i look across this line the only value that seems to reference an efficiency is the 50c%...

am I mistaken or does the 5000k DB get higher efficiency than the 3500k CD? what is its eff @ say 350ma, 700ma, and 1400ma?

i would try dimming the light and saving some electricity while your at it.... or just raise it up.... in addition to the ph issues.... they just remind me of a time my buddy put my clone machine under stronger light and they almost all died... he thought it would be ok since they had giant foot...

OK Just to clarify which efficiency I am speaking of... SETUP X: @ 56.3% (4) CXB3590 3500K CD 36V @ 1.4A (49W ea) on (1) HLG-185H-C1400B 4*49 = 196 dissipation W *.563 = 85.7W heat///// 110.3 Par w 110.3 total Par W / 4ft² = 27.575 Par W / SQ FT = ~1236 PPFD SETUP Z @64% (4) CXB3590 3500K CD...

shameless thread plug... lol i dont feel so bad considering I am going to purchase my stuff through you but would you please enlighten me on my misunderstanding of things so i can fully engineer my fixture please :)...

If the dimmer doesn't alter the forward voltage and therefore Setup B would be more efficient up to a certain point, would it be wise to configure a setup with these 4 cobs, and mount BOTH drivers on the fixture, and with the quick switch of some wires be able to run a higher efficiency during...

Lets assume over 4sq ft: Setup A: (4) cxb3590 36v 3500k CD on (1) HLG-185h-c1400B dimmed to 50% Setup B: (4) cxb3590 36v 3500k CD on (1) HLG-80h-c700B at 100% power 1. These setups pull approx the same wattage amount from the wall, correct? 2. Is Setup A just as efficient as Setup B...

I am confused as to the difference between a 0-10V dimmer and a pot. Which one of these is able to run this kit at lets say 700ma and see the benefit of increased efficiency? Or am I completely wrong and I need to purchase a 700ma driver to see that efficiency gain? So dimming down to...

so my first post got a hug? i literally only started to learn about led's like 2 weeks ago