Ultrafire C9 Cree ?

I bought three but wish that I had only tried one. The construction is OK, and the reflector and emitter with controller screw together to for a small module. The light tail stands, and it looks like a great candidate for modding. Unfortunately, one of the three that I received was DOA, and the other two aren't very bright. An RC-F4 is noticeably brighter.
 
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