I sold this recently. Cost to build was in the 350 range plus bulbs. If you can find a used Maxspect Razor and a suitable T5 fixture to fit the Maxspect inside its worth the couple hours of messing around to put it all together.
The T5 fixture used was a Current USA Nova Extreme Pro 6x39w
Or you could get a 4 or 6 bulb T5 fixture and run 1 or 2 E5 LED tubes
