This bulb's shape is designed for a candelabra-style fixture, but it's base is a standard medium size. It is suitable for use in wall sconces, some ceiling fan fixtures, and chandaliers. At 14 watts, it produces 720 lumens which is equivalent to a 60 watt incandescent bulb. Lasts 8,000 hours. Suitable for indoor use and is not dimmable. Uses 75% less energy than a conventional bulb. Measures 2.4" x 5.4".