approximately 20 hours in flash mode and approximately 6 hours in steady-on mode. The bulb life is approximately 10 years (100,000 hours). The FlareAlert is: Weather resistant . Compact and lightweight design . Dual lighting options . Magnetic base . Environmentally friendly . Easy to use . Crush resistant . Safe for indoor use . No fumes . No dangerous hot flames . Affordable . LED Technology. Operates on 2 AA The battery operated electronic safety flare visible for miles from both the ground and air. The FlareAlert has a battery life of alkaline batteries (sold separately).