17 Watt, T8 835 Phosphor linear fluorescent bulb with Rapid Start and medium bi-pin base, 25 pack. Replaces GE F17T8/SPX35/ECO, Philips F17T8/TL835/ALTO, Osram/Sylvania FO17/835/ECO
NoteAverage life under specified test conditions with lamps turned off and restarted every three hours. Lamp life is longer if lamps are started less frequently.