How do you focus Browning lights?
All Browning lights have LEDs. Most lights with LEDs do not need to be focused because the reflector creates a bright center spot and a flood pattern on the edge of the center.
There are however two Browning lights that can be focused outside of the pattern created by the LED and reflector:
Hunt Master (3711236) which you focus by rotating the top of the light.
Pro Hunter Maxus Headlamp (3713329) which you focus by moving the small lever on the top of the lens to the left or right.