$50 for the light itself x2
$10 for pair of batteries. x2
$15~50 for charger
$5 for mounts

single 18650 battery will give about 1hr of run time. a 2x18650 flashlight will give a bit more than 2hrs of run time.

have you considered a light and motion seca 700 which has a better beam pattern than any of the above?

key point here is the shape of the beam pattern, flashlights are flashlights and dinottes aren't much better.