I have to pass through a metal detector in the guard shack going to and from work everyday (I work for UPS), and to keep metal objects to a minimum I decided on a SL 3N LED light and a UK 2L to carry in my work coat every day. FOr several reasons I have stopped carrying the SL 3N light.
First, it uses difficult to find N cell batteries. Nothing else I own uses them, and I don't keep them on hand, and have difficulty finding them in many stores. On the plus side, it can take 2-AAA cells in an emergency, but due to 1/3 lower voltage, the light is significantly dimmer than with the 4.5V 3-N batteries provides. My SL 3N must have accidently gotten turned on in my pocket sometime, because several weeks ago it was completely drained when I tried to use it, and since I didn't have any N cells to use in it, I now carry a UK 2-AAA LED in its place.
The SL 3N is a well buuilt flashlight, and if you don't mind keeping spare, rare, "N" cells on hand, and can insure it won't accidentally activate, it might fit the bill for you. On the other hand, you might want to consider a AA Minimag with Opalec Newbeam 3-LED drop-in as an alternative. Easy to find Minimag host and uses common AA batteries.
-Keith