Converts 3 or 4 lamp F40T12 recessed 2X4 fixture to 2- F32T8 system. •U.L. Classified •Fits the majority of existing recessed 2X4 fixtures. •Kit includes brackets, tek screws and lampholders. •87% specular reflectivity adequate for most retrofits. •Width = 21.25', Depth = 2.44', Overall length with brackets = 48.0'. •25 year warranty.