KOR (Pack of 6) 25-Watt T8 Tubular Indicator Intermediate (E17) Base - 25W Appliance/Microwave Incandescent Light Bulb (25)

These Incandescent Appliance / Microwave bulbs are 25 watt T8 Incandescent with a clear finish. The average rated lifetime is 2000 hours. They produce around 190 lumens, have an Intermediate (E17) base and will work with a dimmer. They are ideally used in Ovens, Microwaves, Refrigerators, Sewing machines as well as other household appliances............. The basic design of the incandescent lamp has not changed much since the late 1800s, when Thomas Alva Edison successfully produced the fist operational electric light bulb. The filament inside an incandescent lamp must be protected so that oxygen does not reach it and cause it to evaporate on contact. 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.