Welcome to the forum, led are great just read up on them first not much to learn but best to know, they can cause cal mag deficiency but easily sorted with supplements
How do they cause cal/ mag issues? I have a g3 pro 400w white LED that I haven't used yet! I bought it because it was in a damaged container and they only wanted 100 bucks for it! Haven't found anything on this light besides Amazon has some with a multi and chip as mine is 3000k. It actually pulls 400w and wondering how it will perform? Thanks for the help!!