I would like to type the usual: Fenix L2D-CE,
but tend to forget that You ppl in this application have other distances to light up than I have, so
this Ultra Stinger sounds like a very good idea.
If Your collegues all use maglites and such, get a Fenix. Except for the very last meters of total distance (where the Mags als wont show too much), this little light eats them. Also the white led light "seems" brighter to our eyes (as the brain thinks white = brighter than the yellow incan light)
The smaller business end makes it more blinding, so maybe annoying for the worker one on the receiving end.
Runtime on high/Turbo is not too good for a 12 hour shift, but size/weight is perfect and You could have a 2nd set of batts be in the charger while using the 1st one.
And You have a light with You that does not burn through Your dark adaped eyes when checking equipment or some machines (thats why I like my lights with more than one output so much)
Then there are all those
www.dealextreme.com lights, especially the ones for 18650 li-ion cells. Worse quality than Fenix and even better lights but much cheaper.