My daily carry is my E1e for little jobs, and for using around the engineering lab. When I'm on squad duty, or after I have a CCW (when I'm living in the USA again, instead of NJ), I'll prolly carry a Z2 or similar light, maybe with an E2e backup.
I carry a 6P or Z2 on my EMS duty belt, along with a small keychain LED and a mini mag. The surefire is for lighting up scenes and making it so that myself and my partner(s) can work on the pt. The LED is for finding little stuff (keyholes, etc), and the minimag is more for diagnostic stuff (good for checking pupils, etc).
--Jim