Hi guys you would need to use a blue color LED i have ones they sell for salt water tanks and they make flouressant painted stuff glow like how a black light does...and a black light makes glow in the dark stuff glow to full power as soon as the black light hits it!! so if you put one of these LED's in the BB compartment your bbs should glow for sure!!

Here is what i have... the blue ones..I am sure you can take it apart and run it off the battery
http://www.drsfostersmith.com/produc...m?pcatid=12760