I definitely agree with Froggy, you should get both types of lighting, and use the black light sparingly.
One of the LFS here in Madison sells those "glolight" Danios, it's the only tank in the place that has a black light over it, and I'll admit it...that tanks looks pretty cool, but I'm just not sure what the long term damage would be to the fish, having the only source of light come from a black light.