40 watt = 65. Save 38% in energy use (as compared to using a 65 watt bulb). 120 volt. Track & recessed lighting. Energy Used: 40 watts. Average Life: 2,500 hours. Energy savings (uses 40 watt for 65 watt light output). Bright white light. Instant full brightness. Dimmable. Mercury free. To save energy costs, find the bulbs with the light output you need then choose one with the lowest watts. Made in China.