72w = 100 w. Vivid natural light. Simulates full spectrum. Uplifting & bright light. Increases color contrast. Energy Saver Halogen: Halogen technology helps save energy. Uses 28% less energy than a standard incandescent bulb with equivalent light output. Standard Incandescent: Original technology used to provide light be heating a filament. Save 28% in energy use. Energy savings is based on the difference between using a standard 100 watt incandescent bulb and a 72 watt halogen. Saves energy. Bright white light. Instant full brightness. Dimmable. Compliant with 2012 energy regulations. Enhance lamps simulates daylight, brightens colors and increases contrast by removing the dulling effect of yellow light. Show off the natural beauty and vivid colors of your home. Average Life: 1000 hours. 120 volts. Brightness: 1120 lumens. Estimated Yearly Energy Cost: $7.92 based on 3 hrs/day, 11 cents/kWh. Cost depends on rates and use. Life: 0.91 years based on 3 hours/day. Light Appearance: Warm - 3000 K. Energy Used: 72 watts. Made in China.