Save energy costs by replacing fluorescent lighting troffers with even more energy efficient lay-in LED panels. Designed for 2 x 2 foot (24 inch x 24 inch) dropped ceiling grids, these long-life no maintenance panels provide frame to frame lighting coverage with no buzzing and no flickering. They operate on 120-277 volt service with built in dimmable drivers. They are easy to install and are eligible for state and local rebate programs for energy efficient LED lighting in both residential and commercial installations. 50,000 hour average life span backed by a 5 year warranty from Sunlite, a US based manufacturer.