GE Lamps Quartzline incandescent reflector lamp has a power rating of 65 watt and voltage rating of 120 volt. Lamp with medium screw base offers a average life of 2000 hour. It is ideal for decorative as well as chandelier applications. It measures 3.750 inch diameter x 5.370 inch. Light that helps plants look healthier and greenerFor use in track and recessed fixturesLasts 1.8 years based on 3 hours per day usageEstimated yearly energy costs $7.83 based on 3 hours per day $0.11 per kWhR30 shape with medium base65 wattsThe GE plant light bulb is tinted blue to highlight the natural beauty and color of your plants so they appear healthier and greener. For use in track and recessed fixtures.