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I ran 4 QB 304 in parallel on one 320H-C2800B driver for over 3 years.

Use a 320H-C1400 if you plan to run them at max on stock heatsinks. I'm not one to run them that hard, I see no need and on the 240H-C1050 I'm getting 280 watts from the wall, about 130 watts per board, run in papallel. My 4 board QB 304 ( also a 100+ V board ) I've never run above 85 watts per...

Drivers

Meanwell does not reccomend running drivers in parallel and it voids the warranty.

Not enough voltage with that driver. The QB 324 uses about 106 volts if I remember correctly I'm running a pair of them on a 240H-C1050B. They are running at about 130 each, near their 150 watt max.

This is HLG's only competition......... until you see the price! You got a big bargin! https://shop.fluence.science/store/spydr-series/spydr-2i/

I recycle all my soil, there is no reason not to! If your doing organic just keep a bin to put it in. Re-amend the soil, water moderately. And let it sit till the next grow. I always have fresh soil this way. The only time I'd throw out soil was if I had root rot, and if you get root rot...

You won't need another light for many years!

penetration? This is THE most powerful LED on the market. My DIY Diablo light kickass at only 400 watts! I keep it 30" above my vegging plants even at that power. If you want to run that light at full power, you'd best be running CO2 with it!

I would!

Get 4 more QB 132, that will give you about the equivalent of 4 QB 288 and better spread. I wouldn't mix high power LED, QB96, with mid power boards

Got the drivers several days ago. Plants are quite happy. I have the light adjusted to draw 410 watts from the wall. Second pic was 2 days ago.

Light saving? Do you mean energy savings? Then no, there is not. There is only one way to do that, increase efficiency and we are captive to the industry on that matter. And if I can grow 48 sq.ft of bud instead of 16 sq.ft. in a 4x4 space say, isn't that still a more efficient use of...

Sounds to me like you need a lower volume pump. RDWC doesn't need to recirculate rapidly, it just needs to keep the water moving.

picture LEDs on the front and back of a water cooled heatsink, and the meat in a sandwich, then think how many you could stack in a room. A more efficient use of space than using circular trellises.

Got my new drivers a couple days ago finally. 240H-C2100A. Wired one up to two boards, plugged it into my watt meter, and turned it on. 320 Watts from the wall!!! even discounting 20 watts for wiring and driver losses, that's still 300 watts to the boards! I turned it down but could only get...

Sounds like an interesting cross! I've been considering growing hte Banghi Haze.

So much for " legalization"...................

Interesting. My clock is fine, I use a VPN, and I tried with three different browsers. All three browers delete all cookies, history, etc upon close. So no, it's not on my end. As a retired tech, i know a bit about these things... I'll try again in a couple days. Today I get the same errors...

Sorry, i meant it's disorganized, would be neater if the vendors had discrete sub headings.