Plenty of room. =) go for the 400 watt hps and see about getting a really nice bulb.

There are a few 'enhanced spectrum' flowering bulbs that will help out with your lack of spectrum. Also, between the 2000-2200k range, I don't believe there will be much difference at all.

But, by some theories, including that 660nm red spectrum produces resin most efficiently. I'd go with the 2000k.

But as I said, I don't believe there will be much difference if you were to go with the 2200k. As a suggestion, I'd go with an enhanced type.

Grow Lights, Grow Bulbs and Hydroponics - Plantlighting Hydroponics & Grow Lights
High Tech Garden Supply
Light bulbs, Rope Lights, Halogen and Fluorescent bulb - 1000-Bulbs - The Light Bulb Superstore

beSafe:jointsmile: