This is a 120vac regular-shaped bulb, 2 3/8 inches (60mm) in diameter. It uses 20 high brightness leds to produce a soft yellow light that does not attract flying insects. Perfect for accent or mood lighting on your porch or around your deck. Excellent energy saver for all-night lighing of hallway, entryway or stairs. It has an expected life of 50,000 hours. This bulb uses 2.5 watts of electricity.