First thing is to NOT turn it on!
With all the latest advancements in Luxeon or encapsulated LED technology it may be hard to spot a phony Luxeon, or on the other hand personnel involved with carryon screening may have no idea what a Luxeon is....
This is about possibly helping to spot a flashlight bomb that is meant to harm.
So this forum is started to help anyone needing to know about bogus flashlights, myself I will add what I know and not to give any details about constructing such a device, please follow that guideline friends.
Constructive dialogue is appreciated, thanks.