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 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.
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Satco S4885 120V 250 Watt R40 Medium Base Shatterproof Heat Lamp, Clear - 2 Pack
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I have numerous concession trailers and I tend to use quite a few of these throughout the year. They are quite expensive normally to purchase so I was very happy to find them on 鶹 at a good price. They ship in a timely manner and are never broken upon arrival. They last as long as any other heat lamp bulb I have purchased and cost quite a bit less, so I am saving quite a bit by using these. Definitely worth buying!
Lights worked beautifully except for the broken one. Must have broken before the box was even packed. I used them to heat the garage to protect my many plumerias and other plants. I was concerned when it went down to 19deg here, but they did just fine thanks to these 250W bulbs.
Lights worked beautifully except for the broken one. Must have broken before the box was even packed. I used them to heat the garage to protect my many plumerias and other plants. I was concerned when it went down to 19deg here, but they did just fine thanks to these 250W bulbs.