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So QB's without a cover over the led's can't be used on a commercial indoor grow?

what is "cert"?

Seems ok. There are a few things I don't like that LED companies do, like it's a small light. 4x4 4x8 4xanything is pretty normal space so when I see 3x3 I can't find a use for it in my space. The price is decent considering it's not top of the line, the fixture makes it look the best imo but...

To me the debate on if LED or HPS is better has been over a long time. People are growing with near half the wattage of a HPS and getting near or the same yeilds they did with HPS. The cost is the issue for most when it comes to buying or even building LED lights. If in a 4x8 you had 2k watts of...

3500k is what I use, I also use cree but that's just because it was far more popular at the time when I built my lights.

Sure, here's mine so far. It still needs work before it's ready. Will prolly take a few months as this was tester light. had it at 250 watts for a few seconds, 520 chips.

where did you get them?

From my understanding a cheap cob can be less than half as good as a good/decent cob. Basically, to get the same growth you will be running near 2x the watts and heat just to save what, 20-30% of the build cost? I mean, you will still need a driver and heatsink (possibly bigger heatsink) and all...

I don't agree. If you build the lights yourself it's almost equal in cost per sqft of light to space. It costs me around 200$ to build a 240 watt possible light and I'm not doing mass, 100 + on drivers and such for discounts.

Growing large scale for money. It won't matter if it's illegal or legal, home or rented space. HPS is an inferior light, that's why it needs near 2x the watts to do what LED can do. If someone disagrees that ok, if they want to grow with HPS that's ok too. HPS works great, for now. Again, just...

here's my opinion: In 5 years if you are using HPS lights over LED for a commercial grow you will probably be on the verge of going out of business. In a big grow room LED's will simple grow 50-100% more once you start stacking your grows (pallet racks) while your utilities will still be...

Haha, no I will have it done on a PCB. =)

Great! thx for the help. I'll build a tester board and see how it goes!

This is what I see.

Ok, gotcha. makes sense thanks. On the calculator for samsung, the IF_Drive is the ma and the VF is voltage? When all is imputed at .14 IF_Drive I'm at 2.7 Volts, per chip? Would I need a driver that can do like 1404 volts? And is the IF_Drive at .14 equal to a 1.4 mA driver? Confused here...

Ok, i think I found it, thanks Cobkits

I thought dimming made for better efficiency, was that wrong? Basically use a higher ma and dim it down for better efficiency or turn it all the way up. I cant find the simulator if you have a link. =)

I'm looking to mess around and build my own light. Ok, so I am admittedly not the best at figuring this stuff out, but I have looked for the information myself. I can't seem to find out the volts per Samsung 561c s6 chips are, and maybe it's because I don't understand. Basically I'm looking to...

Shitty! I have 12 goji OG seeds ready to go after I put this next stuff in flower.

What happened to the Goji OG? Never saw or hurd from it again!