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Sorry, I thought that was more clear. 16, 4 per heatsink.

Hey Bobby, I'm looking to order some components in a couple weeks or so, and want to get them from you. I'll be lighting a 4x4 scrog, but will be on a bit of a budget, so I thought that 4x1825 driven at 150w (approx 50% efficient) seemed like a good value proposition. Also, I could add more...

I've done several months homework actually. While calcium chloride sounds a bit scary, chloride is a micronutrient, and crops that are dificient do suffer. When you look outside of the mostly ridiculous marijuana nutrient market, you'll see that most calcium ammendments (including many organic...

Thanks @Growmau5 for the latest video, I'm strictly DWC but I find your vids instructive. It was great seeing how little difference the nutrients made. I've been introducing cheaper bulk powders the past couple months as my bottles get used up and have noticed no difference (if anything an...

That's badass, would kill to have that in my cichlid tank :clap:

If you read his post a little more carefully, he says he's used high cri lighting... not high-cri cobs. There are hundreds of posts about his experiences with the 93 cri cmh lighting he used for some time. Also, he probably has you on ignore, so trying to start a fight with him is probably...

if-you-are-new-to-led-and-want-help-choosing-what-to-buy ... stay away from threads like this lol I like how the "experts" are too busy arguing to actually answer any questions from those pesky new-to-led- people

Actually I meant Aliexpress, which I tend to use for small orders. Its nice to be able to buy instantly, the whole quotation system is a pain in the ass (also you don't get 10 unsolicited emails every time you visit the site). I just pick someone with a good price and high ratings, for...

If you are going to buy a used mv meter, you might just want to buy a good quality used ph meter instead. I needed one for my hydro system, so instead of buying an overpriced mass-market unit, I bought a lab grade meter off ebay for about $60. Its the tits. Extremely accurate, built like a...

Hmmm... so efficiency-wise, its not as big a deal as I thought it was to oversize the driver a bit. I thought it was more

I'm not arguing either side of this point, I would just point out that the reason for running them near 100% has absolutely nothing to do with the cost of the driver (otherwise people wouldn't be spending so much extra on more cobs just so they could run more of them at lower wattages to gain...

I've been following along here for months now watching the evolution of these cobs, and have been surprised that so many otherwise obsessive DIYers have been giving up efficiency by using these pads. While I've never built an led fixture I've built plenty of pc's over the last 20 years and...

Try to find an electrical supplier, as in, a store where electricians go to shop. These should be available.

Totally agree, just with his situation it sounds like he'll be paying double or triple what he should. I was just thinking that if he could get a cmh setup locally he'd save a bundle. Also at such low power rates, the cobs will take min 4x longer to pay for themselves. And double that with...

Cheap led's aren't going to be any more efficient than good quality HID (like ceramic metal halide), and cmh spectrum is really nice. Your grow area is only like 5 square feet (.48 square m) and you could probably use one of the newer philips 210w cmh bulbs, which you may even be able to get...