Try one of these.http://www.goldmine-elec-products.com/prodinfo.asp?number=G9589
Then put in one of these filters
http://www.uvsystems.com/checkout/agora.cgi?p_id=3_4&cart_id=168583.19677
Modify the electronics slightly so it will stay on like this.
http://wild-bohemian.com/electronics/avon-mod.html
And finaly put in a short wave bulb like this one.
http://cgi.ebay.com/G4T5-F4T5-GL-Ecoquest-Fresh-Air-Germicidal-Lamp-UV-C_W0QQitemZ270120756946QQihZ017QQcategoryZ43510QQcmdZViewItemQQ_trksidZp1713.m153.l1262
On my light I just did the electronics for a LW UV light, but there is the rest if you want SW UV. Have fun.