EnviroLite LED T8 tube Troffers with battery backup are the perfect solution for commercial grid ceiling lighting needs. Maintenance-free lithium-ion with test switch provides 90-minutes of emergency power. These light fixtures are designed to save energy and lower maintenance costs. The LED tubes use 30% less power to produce the same amount of light as fluorescent ceiling lighting. The LED tubed Troffer is a low-maintenance solution that eliminates the need to replace wired ballasts and drivers, the power source is in the tube. Because it's LED, you will never hear the hum that fluorescent fixtures make. The LED tubes in this commercial lighting Troffer provide daylight white 5000K light. The sturdy frame is easy to handle and installs directly into a grid ceiling using the built-in T-bar clips. The clear prismatic lens distributes the light evenly and blends in visually with other fluorescent fixtures. EnviroLite uses 50,000-hour LED chips in all commercial grade lighting tubes, and they are backed by a 5-year warranty. Troffers are ETL listed and IC rated for contact with insulation and can be installed in damp locations. The EnviroLite tubes included with this Troffer are DLC listed to qualify for commercial lighting rebates and special incentives in certain areas.