Color/Finish: Natural Color Temperature: 3,500K Average Lifetime: 13,000 hours Lumens (light output): 2800 G13 medium bi-pin base Luxrite T8 Fluorescent Bulb Uses 75% less energy then equivalent incandescent lamps. It has a long life of 13,000 Hours and it works with all G13 medium bi-pin sockets. Similar replacement to Philips 281618 F32T8/TL735/ALTO, Westinghouse 37322 F32T8/735/ECOMAX, Philips 272492 F32T8/TL735/ALTO, Bulbrite 528132 F32T8/735/EW, Sylvania 21998 FO32/735/ECO, Philips 162396 F32T8/TL735 PLUS/ALTO, Philips 281832 F32T8/TL735/PLUS/ALTO.