Designed for use in 120-Volt fixtures only, the Feit Electric 50-watt T4 Bright White Halogen Light Bulb is a reliable replacement for traditional 2-pin GY8.6 base bulbs. Our BPQ50/8.6/HDRP bulb produces a 3000K Bright White glow while using 50 watts, ideal for accent lighting, display lighting, task lighting, and security lighting. The 550-lumen bulb is fully dimmable and lasts up to 2,000 hours. The estimated annual energy cost is only $6.02/year (based on 3 hours per day of use). Choose a dependable Feit Electric bulb for all your residential or commercial lighting needs.