TCP 32013Q35K10 fluorescent Quad Tube PL Lamp - 13 Watt (810 Lumens) Warm/Bright White (3500K) 2-Pin (GX23-2 base), 10-Pack Long Life, 10,000 hour average rated life Lower maintenance and labor costs for lamp replacements Lasts 7 years, based on 3 hours use a day Bulb lasts 10-13 times longer than similar incandescent bulbs Perfect for most commercial applications