Sylvania 51470 - QHE2x54T5HO/UNV PSN-MCL T5 Fluorescent Ballast High Efficiency Systems over 90% efficient Universal voltage (120-277V) Low-profile (1.00" High) QUICKSENSE? ballast technology (end-of-lamp-life sensing) PROStart programmed rapid start UL type CC rated Min. Starting Temp: -20?F/-29?C High power factor Over 100,000 switching cycles for occupancy sensor and building control systems applications