Barry Rice in his book and on the ICPS FAQs says he's found no difference in growth due to the color temperature of fluorescent lamps. He says you're just as well of buying cheaper cool or warm white tubes than the more expensive daylight or "plant" tubes. The only thing he recommends is that you buy "name brand" tubes as they last longer and have a more consistent brighter light output then house or generic brands.
Joseph's experience and opinion coincides with Barry Rice's.
Carnivorous Plant FAQ: Light