i have one of these high power LED torches already, it looks like you can get the UV led bulbs for them for about a tenner - i paid about 30.00 for the torch - you could easily get the torch & separate bulb for half the cost of that UV set up
search for Ultrafire or Surefire for the torches and then UV bulb for the separate bulb, then you have an ultra bright torch and the UV option as well. The torches are great for mountain bikes and alike in the dark, they give out massive white light