Disclosed are various embodiments for a lighting device that can include be removably attached to a head guard to form a headlamp system, or other dock. The lighting device includes a battery, a light emitting element, and a lighting device body comprising an inner sleeve and an outer sleeve. The outer sleeve is adapted to slide relative to the inner sleeve along the light device body to toggle the lighting device between (a) an area light mode of operation where light of the light emitting element emits from sides of the lighting device body, and (b) a flashlight mode of operation where light of the light emitting element emits only from a front of the lighting device.