veging

Howdy all, I'm learning about super cropping. i've seen lots of how-to videos but nobody explains how often it can be done. Can you crop more then 1 branch at a time, or will cropping multiple branches stress the plant too much? Is it wise to crop a branch and let it heal before cropping the next?

So im just wondering if anyone else has switched out metal halide for leds and what the results were? Could you tell a difference? Was it positive? Do y out recommend it? And why did you switch led?