With what you are talking about I would use the 600 watt and lots of mylar.. the pair of 400's may give better light but twice the heat running two bulbs..:smokin:
Bender Reviewed by Bender 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