One piece steel construction, fully assembled and ready to install ¢ Fits all standard inverted tee ceiling openings, 1'x4' or 1'x8' parallel or perpendicular to the main tees ¢ Rotary lock lampholders ¢ Ballast cover facilitates maintenance from below, 1/4 turn fastener ¢ Sockets are accessible for replacement without disassembling unit ¢ Intermediate (INT) end end-of-row (EOR) fixtures provide continuous appearance without end caps or cross-tees ¢ T-bar clips are standard on INT and EOR fixtures ¢ Single (SGL) units are provided with two end caps for individual or row mounting where cross-tees are installed between housings ¢ All metal parts are treated with a five stage phosphate bonding process and finished with a baked white enamel ¢ UL listed 1598. Optional CSA label