Light stress?

[Mars Hydro Led]

Actually huge differences in output between an LED and a Laser. Lasers can be built to operate in a wide (relatively speaking) range of frequencies.

Though bright, LEDs do not produce 'coherent' light. This is light were every photon is the same frequency, the same energy level, and they're all traveling in the same direction. It's like getting hit with a firehose instead of a sprinkler.

Yes, LEDs can be very, very bright. Their output is still sprinkler style.

 

[Burlapin]

so i raised my light to 30" i added 2.5ml/gal of cal mag and i got a fan controller with humidity probe so humidity and temp and closer to optimal. the problem is continuing to progress i posted an album of pics about 1 pic a week since i flipped to 12/12. anyone have ideas what else i could try?
https://imgur.com/a/hBFZdxS

 

[SamsonsRiddle]

turn your light upside down and find the right distance for your light, turn over and repeat. some light meters give accurate readings, should be easy to narrow it down with a canopy like that

 

[f-e]

I think my QB's are about 4 inchs at the closest, and 12 inch at the furthest. But it's not a great measure. 40-90k lux, or 600-1200umol are the only things to compare.

First leaf looks like classic calcium. Rash and deformation. Both come from Ca and not a lot else. Then in pic two, both symptoms are gone, and we have some red in the leaves. Leaving me a bit lost.