Surface Mount Troffer, Fixture Type Parabolic, Lamp Quantity 3, Lamp Type F32T8, Suggested Lamp Item 4PL16, 32 Lamp Watts, 88 Fixture Wattage, 120/277 Voltage, Ballast Quantity 1, Instant Start Electronic Ballast Type, Description/Special Features Silver 18-Cell Low Iridescent Anodized Diffuser, 0 to 104 Degrees F Ambient Temp. Range, No Lamp Included, 6-1/4 In. Height, 48 In. Length, 24 In. Width, Standards UL Listed, CSA Certified, NOM Certified, Includes One 3-Lamp Ballast Surface FixturesThese commercial-grade fluorescent fixtures can be surface- or suspension-mounted in unit or row applications (except 2PFV4 and 5YA48 are surface-mount only).Acrylic diffusersParabolicHas a low iridescent anodized diffuser and a contoured housing for superior light control. Designed for use with T8 lamps and electronic ballasts. Mitered corners and interlocking design assure an accurate parabolic shape.