Man, that space is perfect a little SCROG, The light will distribute beautifully over all the nugs nearly equally if you do it right.

The Light:
The absolute optimal light for that space would be a 600W HPS and a 400W MH in a dual light hood with cooling.
Now assuming that Money is an issue. I would personally continue with the light you have. If you want 2 lights for the different photoperiods (I would), then i would buy the 600 W MH and use it for flower and use the 400W for Veg.

If you don't know what SCROG is, just do a search and you will see all kinds of howto's.

I would do 2 plants under whatever light config you choose. It won't take much time to fill a 4x4 screen with 2 plants, that is for sure.

What kind of yield do you want your system to produce? I always like to design around how much i am looking to end up with.
Bachelorpads Reviewed by Bachelorpads on . Which is better? (2)-400w hps or (1)-600 or 1000? Hi. I currently have a 400w PL light setup. I was thinking to augment this with a cheapo 400w hps (used, rebuilt, etc. off ebay or inside sun). Certainly the 400w hps systems are affordable. I wonder though - is it better to have (2)-400's or (1)-600? I'm afraid to go with 1,000 as I'd have heat to deal with and wouldn't be able to get the light as close to the plants anyway so it might be counter-productive. My space is about 3.5 or 4x4 feet. Or - hopeing to not have more than 4 Rating: 5