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the 15W $5 LED puts out as much light as that $10 CFL, lasts virtually forever, and isnt full of toxic mercury

a $5 "100W replacement" led screw in bulb from walmart or home depot is at least as good for clones

25 is arbitrary, not optimal max Tj on gen 6 is 150C. most builds will operate in the 50-80C range the way we use them datasheet: http://cobkits.com/wp-content/uploads/2017/03/CLU048-1212C4_P3811_1116-GEN6-80.pdf

getian has 100V as well

my man! im TOTALLY stealing that

not hating at all. never said they wouldnt grow buds, the ability of a light source to grow weed of good quality is entirely independent of efficiency, you can grow great quality with 80 lm/W fluorescent as well

same as any other HID really in the way it throws light 24"+ is best

best $30 you can spend at harbor freight

any calmag issues i had with LEDs were solved using the same old nute formulations and increasing air temp

thermal grease always my #1. never a fan of graphite. while in theory it should have better conduction, it just seems less pliable and less likely to make good contact thats some interesting failure, never seen that. always thought phosphors were more elastic than that. so were thinking major...

i know there are some people here who buy the $5 pH electrodes for benchtop meters from the dozen from alibaba i love my milwaukee MW802 combo meter but teh SE 600 probes dont last for shit even when stored properly in KCl the pH meter lasts less than year. i even see other amazon users saying...

probably has do do with the fact that most veg rigs are 25% of the size of a flower rig. some people dont veg at all and put clones right into a SOG

settle down dude. i meant to quote that to offer a suggestion that was in contrast to the arduino. no reason to jump on my shit for contributing to the thread

if you werent into programming it could be done mechanically pretty easily as well, there are all kind of interval timers to cut the power, a simple setup could use a cheap dial timer and run each flower cycle for 11:45 instead of 12 (say 00:00-11:45 and 12:00-23:45) a DPDT relay (double pole...

well there are cheaper. but id say its the cheapest *legit* cob out there

ground that sucker before you get zapped

it is a subtle difference, beyond color temp or CRI. spectrums are literally almost identical between onBBL and below BBL wont affect horticulture in the slightest

thanks for the bump RS mathew you can email me at sales at cobkits.com

prob would get some better responses from people with experience in the HID section but in general, dimming HIDs make the lumen/watt efficiency go *down* (unlike LED which is the opposite, for a given setup, less power is higher efficiency in lumen/watt)