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What is BIN? You guys keep mentioning this.. what is it and why is it important? Is this like a "LOT" number to track production runs?

Hi, I'm installing some Cree XML2 chips on an aluminum tube.. I need to increase the sum of the forward voltages of my series setup and figure I may as well add a few red leds to the array. So, I ask.. Which model red are you folks using? Is there a specific chip I should look at? Thanks,

Those pre-built led fixtures are ridiculously expensive.. I can't get over the price these suppliers charge for those things. I guess if I was growing a cash crop it wouldn't be a big issue, but for crying-out-loud, its some LED lights, a power supply and some aluminum. Is there some patented...

Thank you.. I think I'll just stick with the XML2 then since adding the XP variety means more money and using a separate driver because the voltages are different.. I can always add them later. I take it you guys prefer using dedicated constant current drivers for these? Probably more...

Ah.. Got it. So you're just running them at the point where you get the most bang for your electrical dollars. Makes sense. So like I said, I ordered four of the Cree XM-L2 T6-4D 1200LM 4300-4500K you linked. I'm wondering if I should mix in a few of the 620-630nm reds too? They have...

Ok.. so I ordered 4 of the Cree XM-L2 that you linked to just to get me started. Why do you suggest to drive these 3 amp leds at such low current? I understand the lower power when the seedlings just start to sprout, but whey only 600ma for growing? I sure hope that Fasttech reputable...

I'm sorry but I don't understand what that means. A quick google search showed reviews on Amazon saying those were an over priced scam.. But did they work?? Now this I understand. Should I add some reds and blues to go with the whites? Looks like this Supra person knows his stuff..

What about all those special colors like red and blue that everyone uses to grow with? What am I missing?

I am building a grow light for some vegetable seedlings. We start them from seed in "flats" that are 11 x 22 and have 36 plants in each. We grow the seedlings until they are about 8 inches tall and then plant them if our timing is right for the spring. We usually have 8 to 10 flats each year...