Incandescent Decorative Chandelier light bulbs are 40 watts with a torpedo shaped straight tip and crystal clear finish. It has a long average rated life of 1500 hours.It has a simple screw in candelabra with nickle plated screw base for corrosion resistance.for easy installation. They are ideally used in Chandeliers, ceiling fixtures, vanities, and sconces, as well as other household lighting fixtures or fans. Specification: Power: 40W Dimmable: Yes Bulb Base: Standard E12 base Voltage (V) : AC 110-130V Dimension(cm) : Diameter 35mm*Length95mm / 1.37*3.75inches Package Including: 12 x E12 Chandelier Light Bulbs Most incandescent lamps are either vacuum-sealed or gas-filled. Incandescent lamp filaments are made of tungsten. Tungsten is a metal that can operate at very high temperatures without evaporating too quickly and resulting in early lamp failure. Incandescent filaments only convert about 10-Percent of the energy used into visible light, so it is necessary to use a material that can withstand extremely high temperatures. Most lamps use a coiled filament design, which has been found to be stronger and deliver better performance. Tips: Some bulbs may be damaged during transit. When you receive the damaged bulb, please feel free to contact us for free replacement or refund. And we apologize in advance for the inconvenience brought to you.