All of the really good uses I have seen for chem lights have all been people using them to light themselves up so they will be seen.
(A little light shows up a long way away at night in the bush or on the water.)

I can see using them for emergency lighting for a car or crash kit too,with no batteries to worry about.

The idea of expiry date bothers me a bit, but is it possible to give any you are using as emergency lighting to the kids at Halloween and replace them at that time?