The Feit Electric 50-watt T4 bright white halogen light bulb is a reliable replacement for traditional 2-pin T4 bulbs. JCD halogen technology is more energy efficient and longer lasting than traditional incandescent lighting. The 600-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.