So called black lights are UV, but not particularly intense light, so they wouldn't be that good for fafing a finish
Insect / germacidal lamps produce much more UV.
Sun bed lamps (especially the tubes they use these days) are much better and would be the best bet.
However be careful with your eyes around those things.
If you know anybody in the printing industry though they have monster lamps to expose the printing plates.
The bulbs run so hot they are usually water cooled, but about 10 minutes is about a years exposure to the sun.