Philips 268755 - 14902 - PL-T 42W/35/4P/ALTO - 42 Watt Triple Tube Compact Fluorescent Light Bulb, 3500K Initial Lumens: 3200 Mean Lumens: 2720 Base Type: GX24q-4 (4 Pin) Average Life Hours: 12,000 3500K Color Temperature