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After 2 grows under LEDs, I was ready to run back to HIDs, but I wouldn't switch back now.
As others have said, light bars are superior to boards for an even spread of light, but the way the "quantum boards" are set up in the HLG Diablo and similar designs, may also be good. The biggest adjustment for me was not having the heat from the HID lamps during winter months. In a grow I had in another house I lived in, I depended on that heat and I would never have been able to use LEDs there.
At least with the SF4000, those diodes were not offset enough. Those quantum boards in my opinion are still too hot (light intensity, not heat) in the middle of the light. That may or may not be true with the HLG offerings since I've never run them. I am convinced that the best choice today in lighting is bar light LEDs. I'm only using quantum boards in my seedling and mother chambers and I keep them turned way down.
I've run both HID and LEDs. LEDs have a learning curve but are far superior in my opinion than an HID lamp. Also, for those who say they need the heat in the winter months ... if you need that heat with the lights on, you likely need heat added to the area when the lights are off.
Strange.....Everybody I talk to who switched from hps to led has the opposite problem: They're sruggling with serious spikes of humidity.
I don't get spikes in humidity with LEDs. It does rise some ... maybe 5% on watering day but that's about it. We also don't leave excess water behind. We vacuum out the run-off leaving minimal moisture in the drainage trays.