Walmart has GE spiral florescent bulbs that are "Daylight" bulbs. they are a 6500k light. the 2 pack of lights are about $7.
They use 19w of power, and put out 75w of light.
This and a mini clamp on metal reflector from Home Depot or Lowes and you are set up. So far I have had great luck with this set up, and have read many on the internet that share the same success.