in general most will cover a 4 by 4 or 4 by 5 area effectivly but it does vary with different reflectors as per the light being 3 ft away from the plants that is to far away, and while you should make use of refracted light by using mylar or something similiar on the walls.
bejay Reviewed by bejay on . 1000w HPS covers an area of? Hi, Just a quick question. What is the space to be used with a 1000w HPS light? I'm asking because I was wondering how much of these lamps I'd need to cover a space of 11x10. Rating: 5