Is this a cal-mag deficiency? Nutrient burn? idk

Please help me diagnose. It seems the lower leaves are getting discolored. looks like a camoflauge colors, where they are partly a nice green, but there's also yellowing in there. Also, please see picture of my light height. Are the lights too far? I know i have too many plants for the amount of lights. Once i get the big ones to flower room, i will have more room.

Here's pics of the lights.

You should be fine!
As far as the leaf and the yellowing. By location and age of the leaf set....don't worry about it...Unless the yellowing spreads to more leaf sets.

It looks good for me maybe give a bit more nutrients.

Not cal or mag. The two are different and have different deficiency signs. Calcium is little dots on viens and mag is a yellowing like zebraish in a way. You have neither.

Damn, what could it be?