Quote Originally Posted by stivky
Do i need to get 1000w hps or can I just use the 400's as effectivly. Effective coverage each light would have is (I dont know?). most saay 6 to 8 putting them into flower @ 18 inches above base. My room is 10*20. I was thinking 5- 400 (4 hps and 1 hp in middle). Soil base. Pots (11depth*9.5deep)
This should answer your question about how much area of light those 400 watters provide.
:stoned:

*edit* - forgot the link
http://boards.cannabis.com/indoor-li...uch-light.html