Excellent back up light. It has never failed to work even after 6 months with the same batteries. I have identified several false I.D. cards and several conterfeit bills with it.
Pros: U.V. light good for finding phony I.D.s, conterfeit money, crack cocaine, etc
Cons: you have to press the switch 3 times to get to the white light
This review was written in the old system and had content requirements that are different than reviews written today.