Ok, I'll be the first odd duck.

3 C Cells, LED.

500 Lumen Max, 50 lumen low. Push button selector. NO FLASH MODE!

Maglite-type Aluminum Case.

Adjustable focus/flood

Ergonomic grip, something like Count Dooku's light saber form factor.

Three point type retention strap with breakaway buckle.

Glass breaker point embedded on the button end of the case, offset from center, under the palm to also aid in grip retention.

That'd be a good start anyways.