The lem04 from lithonia lighting is a ul listed led emergency driver that enables led fixtures to deliver 90 minutes of emergency illumination during a loss of normal power with an initial output of 4 watts of power. The lem04 is compatible with most class 2 led fixture designs with a forward voltage of 20-50vdc. The lem04 features integral and dual-flex mounting configurations to suit individual fixture requirements. Includes single-piece test switch and charge indicator accessory. The lithonia lighting lem04 a is a ul listed emergency driver intended for use with 20-50vdc class 2 luminaires. During a loss of normal power, the lem04 a emergency driver switches from the existing normal ac driver to operate the led load with an initial output power of 4w for up to 90 minutes. The lem04 a features an internal battery charger, inverter circuit, and nickel-cadmium battery in a white-painted steel enclosure, and includes a single-piece test switch and charge indicator light for installation within or adjacent to the fixture. Features dual flexible conduit for external mounting to the fixture.