GE Lighting 71764 Energy Smart Spiral CFL 20-Watt (75-watt replacement) 1235-Lumen T3 Spiral Light Bulb with Medium Base, 1-Pack Energy STAR Smart- Instant on 5 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 1240 Lumens-consumes 20 watts-equivalent to 75 Watts 6000 Hour - Energy Star