Efficient Lighting Energy Star Fluorescent Smart Energy Saving Mini-Spiral Light Bulb 23-watt Warm White 100-watt Replacement- 8 PACK 2700K Warm White Energy Star Partner Energy Saving Bulb Light Output : 1600 Lumens; Energy Used : 23 Watts; Bulb Life : 10,000 Hours Cost Savings is based on 12 cents/kWh vs. the cost of using 10 standard incandescent bulbs RoHS Compliant and Earth Friendly Flicker free, Mini-Spiral