Halogen are in the 2.8k-3.5k range depending on the bulb. Cooler than a normal tungsten bulb, but not daylight. Remember halogen bulbs still have tungsten filaments. Tungsten bulbs should be fine, but if you have daylight balanced bulbs, exposure might be a hair better as mentioned above, and tonal rendition of some colors might be better too.
I've had no problem with any of the CFL bulbs I've bought over the years. The first set I bought in 2001 are still going strong. Just dispose of them properly.