Thanks Brock.....I was playing with the 2 lights switching flashlight heads and it was tough twisting and pulling the head off the UK2L, I gave it a moderately forcefull twist and pull which jolted (and killed the bulb) the whole head (bezel with bulb and reflector) as it went off the UK2L body.
I was trying to get to the bulb (only) to test, but run into trouble when looking for a way to pull the bulb from its base to test for circuit continuity. Looks like its a bulb-base-reflector-assembly for the UKE4AA/2L.
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2d_edge