Equals 50 watts. 120 volt. R20. Energy saver. Track lighting. Save 20% in energy use (as compared to using a 50 watt bulb). Energy Used: 40 watts. Average Life: 2500 hours. To save energy costs, find the bulbs with the light output you need, then choose the one with the lowest watts. Energy savings (uses 40 watt for 50 watt light output). Bright white light. Instant full brightness. Dimmable. Mercury free. Made in China.