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they have crazy numbers but it must be some really intermittent spike. exceeded their design specs by 4 times and never tripped a breaker

looking for something to use right away. i have some (old) SLF-100, wonder if it would be of use

arggh... did the same thing and got the slime this time. day 7 im going to change the res asap and double up on the hypochlorite, not sure what to do with the cuts though? rinse the slime off manually? recut and redip in rooting hormone? dip briefly in a more concentrated hypoclorite?

Not many people spending $50 on cobs these days. $10-$25 is a better estimate

also a single 400 in your house is pretty easy to cool

its affordable and gives more uniform coverage than any other option proposed in this thread.

$400 is a stretch, heres $550 9 of these: http://cobkits.com/product/cxm22-passive-light-engine-133mm/ 3 of these: https://cobkits.com/product/meanwell-hlg-185h-48a-driver/

it "can be done", and is within chip spec, but most people would opt for a citi 1216, 1818, or luminus at that wattage. 4 1212s on a 185 would do you right, about 220W which is a little low for a 3x3 but works i just like 4 cobs in a square space

my bad thought this was a weed forum

not sure how thats related to their concerns of low efficiency and high cost. just because an overpriced medium efficiency light can veg a space doesnt mean its the best option

me fail english? unpossible!

regular 90 still looks like a winner. can you calc YPF?

there are better options than cree or vero luminus is what i would recommend for a square tent 4 cobs will do better than 3 4 cobs at 75W works great 75W is a little hot for a 1212

im getting 15g per watt y'all are growing alfalfa sprouts, too, right?

sort of. first part is right, but series doesnt 'divide available voltage. if you have a series CC driver which is 1400 mA, and your cobs run at 36.5V, they will use 73, 109.5, or 146V if you use 2,3, or 4 cobs. lets say your driver had a max voltage of 156V, you wouldnt be using all the...

As of now, the RIU code is not active discounts are avaialbel for larger orders, please email if you have a larger order and we can discuss options

i found 2 cases of 120mm heatsinks, these are the last of the last http://cobkits.com/product/120-mm-passive-pin-fin-heatsink/

not sure if you mean that how its written the cobs may have a nominal/arbitrarily stated Fv of 51.5, but its well over 54V at 2.2A see data sheet, 320 is slightly more efficient. 2x 185s are more powerful though (well over 400W), 320 is around 360W if you got 4 cobs hanging out, dimming them...

is it a real HLG QB? never heard of that

so you wont take the bet then, no worries. putting you on the ignore list now