As close as u can get without heat burn, i would say about 16" for nowI just put my blueberry x lowrdyer in the the dirt a few days ago. I was wondering how far should I keep my 400W hps light away from them? Thanks.
Lowryder strains were also designed to be able to handle 24 hrs of hps light from seed I believe.i was gonna get some blueberry x lowryder. anywayz why dont you use some floro's for them lil babiez. you dont want you light to kill them