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there is. every fixture can easily be quantified by two numbers -Actual input watts -PPF delivered if your fixture manufacturer cant provide these, they are not worthy of your money

if you cant return them for cash see if he will give you credit towards DE HPS or CMH, at least they will work for you - you want 4x315 CMH or 2 x 750 or 1000 DE HPS for that space assuming he doesnt have any decent LEDs (or understanding of such) if those are the LEDs hes pushing Most hydro...

none right now just 288s

320 per light with the efficiency of the epistar chips they mention youre probably looking at covering a 2'x3' per light so youd need at least 6 of those lights for your tent dont feel dumb, the majority of the people on this forum (myself included) bought crappy LEDs at some point before...

also youre using 100X more light than you need. Assuming electricity isnt free where you live ;)

as expected return them if you can theyre only about as efficient as HPS at best

of course it is its also a non-consumer friendly extra math problem involving constants not necessarily in front of you at the time

get one of those $10 water probes from home depot it will tell you if your soil is soggy 6" down

some details on the lights would help "2 1800 W cob leds" means nothing and im gonna go out on a limb and assume that you have a pair of cheap 300W lights sitting there

werent you experimenting with heavy defoliating? how'd that end up?

but you are lol. i dont know of any that are more efficient at 50W, even the bigger more expensive chips

i have QBs in stock on my site

4K for veg imo.

60-100W of any decent LED can veg a 2x2 nicely

never heard of it link?

depends on the current requirements of the fans. it is 1A

you can calculate the efficiency of any led by the formula (mW output) / (voltage x current) Nominal/test durrent is usually stated corresponding voltage at that current can be looke dup on same datasheet the reason they use mW of output is lumens are meaningless for monos

i bought a bunch of those off amazon

ill send you some real cobs if you teach me how to use my lulzbot lol

sure email is in my sig