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Still trucking. Three weeks of flowering in this over-stuffed 31"x31" tent. Four plants, 3 gallon fabric pots (ROLS), 4xQB120s @250w. I really need to get in there and thin them out a bit.

I think OP's point is that because this light will be dedicated to veg, there is no sense in running that much wattage.

Sorry to burst the bubble of your fanboy accusation, but the HLG 600H to which he refers is a Meanwell driver, not any product from Horticultural Lighting Group (HLG). So perhaps Meanwell dick riders?

Haven't I? How gracious of you to tell me.

Cool cred? You're funny.

I'll take experience over youth every damn time, man.

Your cab is 8 inches deep??

Then you haven't read much on these forums. People are using and endorsing Fluence, Timber, PLC, Amare, and more. Not sure why you're offended that people don't think this Cirrus is a good deal, even at half price. In many people's opinion, $500 will always be too much to spend on a fixture for...

Another way of saying that dimming decreases efficiency.

You absolutely should be able to get as much bud from 320 watts of QBs as you get from 600 watts of HPS. But many people run 1,000 watts of HPS in their 4x4s, which is what people are replacing with the HLG-550 and HLG-600 (4-board fixtures running 500-600 watts).

Between just those two? If I had the headroom, Gavita.

Here's another great plug-and-play option: https://growerslights.com/collections/led-grow-lights/products/horticulture-lighting-group-600h-quantum-board-led-kit You can order it pre-assembled. Again, one per 4x4.

Don't take it personally when I say that it's overpriced and outdated. No one is saying you're stupid. But facts are facts, and it's simply true that there are better lights for less money. If you're happy and you're growing herb that satisfies your needs, that's great. But our observations on...

PM forum member @diyled for a UK hookup on something comparable to the QBs.

No offense, but that doesn't exactly peg the needle on my convincement gauge. Hope some forum peeps start journaling your lights so we can see how they perform.

I think the question is whether the amount of UV inherent in CMH will actually make any noticable difference to potency. There's still a dearth of data on that subject, as far as I know.

Not going after him. Just asking for more info. But I remain unconvinced (though open to the possibility) that spectrum matters more than efficacy. Still waiting for hard, real-world data on that one. Same for ChilLED's mixed-spectrum boards (on the spectrum benefit issue). I'll be very happy to...

If you don't want people's opinions on the light, don't post a thread on it. Nothing gets a free pass, and every fixture that's reviewed is assessed on its own merits (or lack thereof). There are quantifiable metrics by which a light can be judged, regardless of whether or not someone has used...

So... Any grow pics? It sounds like you're saying that these Nichias diodes are superior to Samsung's (for growing), so I assume that you must have plenty of real-world, growing-performance data?

Looks like we're not going to get an answer.