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Order from Arrow instead and you get free overnight shipping. Price is only $1.27 more. - free shipping more than makes up for the difference.
Close but no cigar. 8 QB132's at max current will produce about 97,000 lumens and 1400 uMol's/s PPF, slightly more light than a 600W HPS (90k...
No, not 4 of them. Maximum power is only 72 watts per board. You would need about 8 of them at 50-60 watts each to equal a 600W HID light.
No, what they should have is true wattage and total PAR output.
LOL - ain't that the truth!
Yes - they are leaving out half the diodes using the original boards. The only way to do that is to remove 9 parallel strings of 16 series diodes,...
Utterly and totally incorrect. HPS is approximately 25-30% efficient - depending on wattage. Incandescent (tungsten filament) is the least...
You are correct. Its actually closer to 2/3. With High efficient LEDs like Quantum board you usually need about 400 watts to equal the PAR output...
Depends on the LED. Lots of marketing BS out there regarding LEDs. I would suggest looking into Quantum boards or Samsung Strips based lights...
There's a world of difference between that junk and high efficiency COBs, Samsung Strips or Quantum boards.
I don't think you will see that much of a heat issue with only 250W HPS. Thats just about right for your space. It should work well, much better...
LOL 600W ???? Really? did you read OP's post at all? he is in a slightly less than 2x2.
There is really no such thing as a "constant current design" board when it comes to LED's - however the layout of the QB-288 has 16 LEDs (or maybe...
Two of those would be about right for that size space. Run both and dim them a little in Veg.
"medium" definitely seems to be the setting to use, from 18" on down
I don't have any specific recommendations other than stay away from the bottom of the barrel if you want something with decent accuracy. Your...
This. Your grow technique is what's going to get your yield, not the type of light you use.
I hear ya - I just scored a Fluke 89 from a guy at work for 40 bucks. Been a while since I had a good meter.
Unfortunately a lot of the cheap multimeters won't do AC current, only DC. I've got a couple like that. Another simple method you can use is to...
Yeah, sounds like the meter is off. I had some like that - they only measured 50% of the actual current when compared to my multimeter, which I...