Sylvania 49161 QTP Electronic Fluorescent Ballast, FP54T5HO Lamp, 54 W Lamp, 120 to 277 VAC, Programmed/Rapid Start, Ballast Factor: 1

These QUICKTRONIC® PROStart® T5HO ballasts are specifically designed for applications where the ballast is subjected to higher ambient temperatures, as in high bay industrial installations. The four lamp UNV (120 to 277 VAC) ballast system provides 18600 mean lumens, which, when factoring in lumen maintenance and typical T5HO fixture efficiency, can be considered as a direct replacement for standard 400 W MH. As such, the family is ideally suited to replace 250 to 400 W metal halide installations.