Cheap lights using CR123 batteries

Well,

Are there any? I need some backup lights, and it'd be nice to use the same
batteries as my main light.

Cheers,
tom

--
We are going to have to be speculative, but there is good and
bad speculation, and this is not an unparalleled activity in
science. [...] Those scientists who have no taste for this sort of
speculative enterprise will just have to stay in the trenches and do
without it, while the rest of us risk embarrassing mistakes and have a
lot of fun. -- Daniel Dennett