CFLs as grow lights

[amideutch]

Bill, I think the best setup for you would be the Dual Arc Bulb with the Econowing or Yieldmaster ll reflector. The Dual Arc bulb is a combination 600 watt sodium and a 400 watt halide giving you the best of both worlds, halide for the growing phase and sodium for the flower/fruit phase. Plus the added benefit of supplemental heat generated by the Dual Arc bulb for your greenhouse as dcarch has suggested.
The 3 CFL's plus fixtures is $270.00. 335 watts illumination.
The Dual Arc/w Econowing is $293.00 and $50.00 more for the Yield Master ll. 1,000 watts illumination.
They also have the Mylar Reflective film 54"x25' for $14.95.
Growing Tomatoes from seedling to maturity I believe your results would be less than satisfactory with CFL's as compared to the halide/sodium combination. Plus when you set out your plants have the determinate/dwarfs in the middle of the lighted area and your indeterminate's on the side to avoid shading of the smaller plants by the larger ones. And if later you want to increase the illuminated area of your green house you can put your light on a track assembly that will move your light back and forth along the length of your green house. Ami