Streamlight Tasklight 2 - L: Two brightness settings (120 lumens at its brightest), about 6" in length, robust enough to use on a drilling rig. Cons include its CR123A battery requirement (relatively cheap in bulk through Streamlight, though), and a switch that's too easy to accidentally turn on when carried in a pant leg pocket. Mine cost $67.00 IIRC.
'7? Benelli 650S, '80 BMW R100 RS, '07 KTM 990 Adventure