GE Lighting 71763 Energy Smart Spiral CFL 13-Watt (60-watt replacement) 855-Lumen T3 Spiral Light Bulb with Medium Base, 1-Pack Energy STAR Smart- Instant on 4 Year Limited Warranty Guaranteed to last 4 years based on rated life at 4 hours consumer use per day at 120Volts. SunShine' lamp simulates Mid-Day sunlight at 5000K Light output 855 Lumens-consumes 13watts-equivalent to 60 Watts 6000 Hour - Energy Star