Sunpark T5, 28 watt Electronic Ballast, 120 volt. Operates - 1 or 2 - F28T5. Power Factor - 0.99, THD - 10%, Ballast Factor - 1.0. Minimum Start Temperature - 32 Degrees F. Siz: Length - 14.2", Width - 1.24", Height - 1.0". Rated - UL / uUL, Crest Factor < 1.70, Sound Rated A, Class P, Outdoor Type 1, EMI: Meet FCC Title 47, Part 18. Item # SP282/28T5.