Just wanted to give you guys a heads up that the new Philips LED bulbs are actually made with bluish LEDs inside, and a removable phosphor
http://www.edn.com/electronics-blogs...r-down-Part-II
I haven't had a chance to look at the spectrum yet (hopefully should be able to in early january), but based on the descriptions these may be a cheap source of UV or deep blue LEDs (18 LEds per bulb, bulbs costs $20 or so).