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With the right components, in the right configuration, you absolutely can take on a DE. I'd think that 700w or so (used correctly) would out-yield a DE. There is a thread here ("From DEs to LEDs", or something like that) where a dude tried replacing his DEs with 750w of Quantum Boards, and now...

With an A-series Meanwell, he should pass 500w. (I believe the HLG-550 tops out at 510w.) Looking at the results Grand Master Level got with his 550's (they consistently out-yielded the 1,000w HPS fixtures he was running against them), I'd say that someone who knows what they're doing can...

I'd love to set up a greenhouse for some outdoor, but even though I'm a legit medical patient in a legal state, I tend to worry about that. Don't want nosy neighbors getting suspicious about the smell!

Nice build, man!! Only thing I'd be worried about would be airflow - I would imagine that using one big plate of aluminum would tend to hamper the free flow of air? Still, it's damn impressive work!

1,200w would work very well in that space, I'm sure. I agree that the HLG-550 is too costly. If you were inclined to go the easy route, I'd suggest the HLG-600 from growerslights.com; but DIY would be even better, as long as you're comfortable doing the work. Have you looked at any of the...

50w/sq ft is not optimum. The only optimum is what suits your grow space. But as long as we're talking averages, 30w/sq ft is certainly more commonplace around here.

Fucking cool.

Sorry if you already said this, by what is your budget?

This is regarding "white" light LEDs like (good) COBs, Quantum Boards (and the copy-cats), and Samsung/Bridgelux strip-lights: It is not generally recommended to use 50w sq/ft with LED. Poke around the threads here on the LED sub-forum and you'll see that 30w is more often recommended than 50...

You can be quite certain they are not the same as HLG's boards. They could be very similar, but they won't be identical. Watch out for rip-offs though - a lot of these QB copies are of lower quality. That doesn't mean they won't work for you, but just be aware.

QB120s, don't you mean?

When was that? How many bulbs were you running, and at what wattage/Kelvin?

Always nice to see another kratom user here. It's been my daily companion for 10 years. Saved me from opiates. Still my favorite substance, even over cannabis.

Thanks! X-Max (I said V-Max in that last post, but I fucked it up). Same hardware as the Storm Vaporizer (from the UK). Cheapest good vaporizer I could find, and it really is good. Doesn't burn the bud, but gives nice clouds. I get two solid sessions out of every bowl (first round at 392°F and...

Yeah, if you have the budget, it certainly doesn't hurt to over-build. But if you're going to do that, might I recommend that you consider modularity and break-down-ability in the design of your frame? You could design it in such a way that you could quickly and easily transfer it to a 4x4...

If that beginner isn't planning to actually use all of the 16 square feet that are in a 4x4, then I'll agree with you. As for their extra 20%. I have no idea what they're talking about. I'm not aware of any special way to wire a driver.

I rarely take pics (because my camera is a piece of shit), but what the hell, here's some QB-grown bud curing in the jar. Latest harvest of my favorite strain, HSO's Black D.O.G. Smells like gasoline, tastes like dirt and lemons. Tasty and POTENT. I fucking love this strain. About to load up the...

I don't know, man... More light is definitely not always better, and there is a point of diminishing returns. As for bud density - that does seem to be very strain dependent, and I haven't seen anything to indicate that a certain PPFD level determines density. And cramming 1000w of light into...

https://truenorthernlighting.com

Just curious, but have you tried a full grow at lower wattage? Though there are some here that grow at high light levels, most folks seem to settle at around 30w/sq ft. It's possible that you could get results that are just as good, but with less power. Though I do understand your desire to...