Clones-How Long Before HPS 400watt?

Clones 8 days old. When do they go under HPS?

Now or up to a couple weeks from now. Remember, they will double their size when 12/12 sets in for two weeks they'll strech. Make sure to feed them a lil more nitrogen at that point.

i waited until mine had rooted and could be transplanted, and then threw them under. probably 8 days total after taking them