Using filters would be a waste of time and not help your plants unless you are aiming for the look of colored lights on your plants. If you use a daylight cfl bulb your plants will use certain wavelengths of blue and red for photosynthesis and the other wavelengths will have no effect. I'm currently having good results with using 40 watt Feit Ecobulb Daylight 2800K cfl bulbs and in the past I had good results using 4 ft shop lights with 1 warm white and 1 cool white bulb, or two of the GE Sunlight tubes that come in an orange sleeve with yellow lettering.

I had good results with fixtures shown in the link that cost $29 to build including the bulbs.

And you can get a ready made Hydrofarm cfl grow lamp for around $42 on Amazon.

Here is a link that might be useful: Cheap fixtures.