CHM, LED and other lighting options

this 4 COB kit would be perfect for a 2x4, 380 watts or 47.5 watts per square foot, but it’s $460 so you’d be better off buying 2x the 3 cob kit for $440 total and it’d be dimmable from 370-530 watts. can also get PCB LEDs, they have a very thin profile (a few inches) and don’t generate much heat. very cheap from china.

https://www.rapidled.com/vero29se-2-x-4-grow-kit/

https://www.rapidled.com/vero29-triple-cob-array-kit/