The 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. GE's specialty bulbs offer innovative solutions for a variety of lighting needsThe GE plant light bulb is tinted blue to highlight the natural beauty and color of your plants so they appear healthier and greenerR20 shape with medium base that makes plants look healthier and greenerLasts 1.8 years based on 3 hours per day usage50 watt