A component of an emergency evacuation system, lightstick. it is designed to provide safe, non-electrical light when activated by opening the case.
NSN 6110-01-157-9085
NSN 5895-01-654-3177
NSN 7035-00-225-1961
NSN 6220-01-335-3264
NSN 6150-01-286-4192
NSN 5999-01-555-6714
NSN 5920-00-119-1406
NSN 5985-01-198-1844
NSN 5920-00-340-3002
NSN 6220-00-830-4692
NSN 5915-01-620-4302
NSN 5990-01-147-5225