Direct 4 X 4 with parabolic louver. Has a 6063T5 extruded aluminumhousing and a highly reflective die formed white paintedaluminum reflector. Die formed anodized snap in aluminum semispecular parabolic louver, removable for lamp replacement. Standard T8 Instant start 120/277 volt electronic ballast with less than 10 percentTHD. Through wiring with quick connects standard. Standard single circuit. Aircraft cable, half inch diameter rigid stempendant, wall and surface mount available.