Envirobrite RBC Ballast Cover kits are used to convert 4 and 8 ft. T12and older T8 lamp fixtures resulting in substantial energy savings,improved lighting with excellent returns on investments. These kits, inconjunction with several ballast and lamp configurations, can easilyproduce ideal IES recommended light levels with minimized energyconsumption. 2 300 series white painted aluminum, 4 Clip Strip reversible white-painted aluminum bracket adjustable to any channel size between 4.0 to 5.25 in., 4 or 8 specified shunted or unshunted high quality chemical resistant thermoplastic body UL approved lamp holders, 4 Quarter turns, 10 tek screws.