Ideal for a wide range of settings in part to not containing the hazardous chemical, mercury. Featuring a candelabra (E12) base, these lamps were meticulously designed to fit in a variety of applications. When attached to a dimmer switch, these lamps can be adjusted from 100% to 1% and anywhere in between with no flickering. MERCURY FREE – These bulbs contain no mercury or other harmful chemicals making them safe for the environment. Bulb measures 2.06 inches high, 0.86 inches in diameter.