Our Volumetric Retrofit combines a one piece frame and stylish LED lamp, creating a high end look that can be installed in existing troffers in just minutes. The patented design utilizes a unique tab/cam system that makes it a universal fit for T-bar ceiling grids. The seamless design means excellent bug and dirt control. There is no need to raise the troffer or compromise the ceiling plenum during installation. The sturdy, steel frame ensures support for the lamp and the safety lock feature firmly holds the assembly in place.