Ideal for office, government, educational and retail retrofits, Architectural inspired center basket or dual lens design, Save 50% or more in energy over existing 4-lamp T12 luminaires, Pre-assembled & wired to CEE listed ballast, Ready-Set™ captive screws for quick, easy installation in 10 minutes, One piece tool-less reflector eliminates the need for any parts bag, Fits troffers or parabolics as shallow as 3-1/2" deep, Reuses existing housing to lower install time and removal cost