I use one T8 on the Darts Viv and two compact fluorescents.
a 24inch GE Aquarium 18-Watt T8 Fluorescent Bulb available at Lowes which shows a 10000K color temperature on the bulb.

The two compacts are from Home Depot and are EcoSmart 14-Watt (60W) Daylight CFL Light Bulbs which have 5500K on the bulb for color temp.

On the Red Eyes viv I have two Repti-glo 2.0s which work nicely and all my plants seem to do well.
The Whites have a EcoSmart 26-Watt (100W) Daylight CFL Light Bulb and this throws tons of light compared to the 26 watt Repti-Sun I had in use. This Ecosmart only shows 5000K color temp on the bulb.