Where is the longest burning light bulb?
Livermore's Conntenental Light Bulb
A light bulb is a source of electric light. In an incandescent light bulb, the glass bulb forms a protective shield around a glowing filament. The air inside the glass bulb is removed, or replaced with an inert gas. Electric current is passed through a thin metal filament (usually tungsten), which causes it to glow white hot, giving out light. The protective bulb stops the filament from burning up, as it has no Oxygen.
Probably a LED bulb, because it has no wear-out components. For example, a tungsten bulb filament gets thinner and thinner because tungsten sublimes off the filament and plates out on the glass envelope. CFL bulbs have hot cathodes with the same problem. LED bulbs only fail due to manufacturing defect or misuse. Answer: The current holder for longest lasting bulbs is The world's longest lasting light bulb is the Centennial Light located at 4550 East…
What gas is used in light bulbs so that the metal in the light bulb can get very hot without burning?
Glass was, and still is, a cost effective means of insulating the burning filiment of a light bulb from the air. It is also important that it is transparent so the light is not blocked. This greatly slows the burn rate allowing the bulb to last longer. And it protects people from burning themselves on the filiment.