The problem is that I need lighting for a veg area. Currently I have two ballasts running two 400W MH lights in my grow room. One ballast is rated at 1000W, the other at 400W. I have two 175W Multi-vapor bulbs, so as you can see by the math, (2x400W bulbs on the 1000W ballast, 2x175W bulbs on the 400W ballast) I could solve my problem. I'm just not ready to experiment and risk screwing up my current grow!