Energy saver. 40 w = 60 w. Save 33% in energy use compared to a 60 watt bulb. Saves energy. Bright white light. Instant full brightness. Dimmable. Energy Saver Halogen: Halogen technology helps save energy. Uses 33% less energy then a standard incandescent bulb with equivalent light output. Standard Incandescent: Original technology used to provide light by heating a filament. Brightness: 600 lumens. Average Life: 1500 hours. Estimated Energy Cost: $4.82 per year. Lighting Facts per Bulb: Brightness: 600 lumens. Estimated Yearly Energy Cost: $4.82 based on 3 hrs/day, 11 cents/kWh. Cost depends on rates and use. Life: Based on 3 hrs/day: 1.4 years. Light Appearance Warm: 3000 K. Energy Used: 40 watts. Made in China.