Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb Clear

Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb, Clear - Incandescent Bulbs -. 1500 average rated hours 。 25-Watt intermediate base 。 Clear light bulb 。 The basic design of the incandescent lamp has not changed much since the late 100s, 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 an 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. 。 。 。

Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb Clear

Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb Clear
Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb Clear
Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb Clear
Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb Clear

Satco S4700 120V Intermediate Base 25-Watt R14 Light Bulb Clear

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