Artificial lighting is rated for color temperature ... you want that to be over 5000 K.
Compact fluorescent bulbs usually have the color temperature marked on the base.
Fluorescent tubes don't usually have that marking, but are marked "soft white", "daylight", etc. Use the "daylight" ones which have a color temperature close to sunlight.
LEDs are not marked, as far as I know, but typically emit light with a color temperature close to "daylight", so they should be OK. However, with LEDs, intensity is the problem ... you need lots of LEDs to get enough intensity, hence the large panel of LEDs for photographing cars.
I would be interested to know if several CREE type LED flashlights would provide enough intensity to photograph pens.