The Larson Electronics EPL-EMG-48-2L-LED-G2 explosion proof LED emergency light uses LED tubes that provide 30 percent more light than T8 fluorescent tubes with a 50,000 hour operational life. Constructed of copper-free aluminum, the light comes with brackets that allow operators to adjust the angle of the fixture. An internal battery backup system comes with the light. The backup system will automatically take over after power failure and run the light for up to 90 minutes. Once power returns, the backup system recharges the internal battery while still operating the light.