Not sure where you live, but if you go to your local big box hardware store, you can get a light fixture cheaper than that, look for one with reflective "wings " on it.
And if you have the fixture, you might as well use it in the flower stage too....more light the merrier!
Using the CFL's in conjunction with the fixture will be best.

Take a look at the links in my signature to see what I did with the CFL's
I use a 400 watt HPS and still use CFL's for side lighting.
Also, use the opposite spectrum on some of your lighting....full spectrum is the way to go
hanayama Reviewed by hanayama on . Lighting advice Hey guys This is my first post on this site and im just looking for some advice on my grow. I'm looking to grow about two plants in a cupboard using fluorescent tubes for veg and cfl for flowering unless anyone has any better suggestions. Bare in mind that i am looking for a low cost descrete grow room, so HID's are outta the question but any advice would be great. My first buy is gonna be this a twin t8 70w fluorescent battern: Elec Twin T8 HPF Fluorescent Batten Fitting C/w 6ft 70W Tubes Rating: 5