Instead of the all-purpose button you find on most headlamps, the Epic has an on/off switch and a separate dial with five modes: off, green, and 2, 4, or 10 hours of burn time, which we confirmed. This prevents accidental power-ons (the bane of most headlamps) and eliminates the mystery of how long the lamp will last. It's lightweight, with a soft-molded forehead plate (the comfiest in the test). But the battery compartment cap is easy to lose, which would render the unit useless. With its shorter runtime and narrow beam, we thought it was a touch expensive compared to competitors.