Sylvania Octron XP Extended Performance Curvalume T8 Fluorescent Lamp - 31 Watt - 22.5" Length - 1-5/8" Leg Spacing - 3000K Color Temperature - 85 CRI - Medium Bi-Pin Base - 24,000 Hours Rated Life - U-Bend Bulb Shape - 2,775 Lumens - Suitable For IS Or RS Operation.