LED EPN24-2050sem-2 is thoughtfully designed for superior illumination, ultimate efficiency, and easy installation. This 2×4 LED panel offers an integrated LED driver and backup battery for a total of 90 minutes of emergency backup illumination. The backup battery is both self-testing and easily replaceable. Double-sided welding provides a seamless, polished frame and PMMA material guarantees perfect light output without the risk of yellowing. Available in flicker-free Cool White (5000K), this fixture LED panel delivers 5000 lumens with just 50 watts.