Hi H

I have two of the Orbit fixtures. One is a 2x40w and the other is a 2x65w fixture. They are excellent PC fixtures. IMO, they are better than the Coralife Aqualight PC's. The Orbit reflector is much wider than the Aqualight and it is comparable to AHSupply's excellent reflector. The Orbit has three power cords with 2 on/off switches. The fan comes on with the front bulbs.

I replaced my dual actinic 65w bulb with a Coralife 65w Colormax/6700K square pin bulb. Coralife Colormax-6700K 65W Power Compact Lamp-Sq.Pin at Big Al's Online

Many people are going to HO T5's. Have you looked at these? The SunlightSupply.com TEK fixture is popular.