Tungsram frosted lightbulb with switch

The lightbulb has replaced candles, kerosene lamps and gas lamps, which were once the main sources of light in households and public places. It also contributed to the popularisation of electricity. Every lightbulb has a base connected to a source of electricity, a glass bulb, which sometimes, as is the case in the presented example, also fulfils the function of diffuser of light, and a filament that glows as electricity passes through it. In some cases, lightbulbs have their own switch incorporated. A tungsten filament was used in a lightbulb for the first time by Aleksander Nikolayevich Lodygin in 1890. The choice of tungsten as a material was determined by the most important physical characteristic of this element, i.e., its high melting point (at 3422 °C). The item presented here was made at the Tungsram factory, which made light bulbs and electron lamps. Manufacturer: Tungsram, 1930-1940 Inv. No.: MIM1890/IV-101 Model prepared on the basis of photogrammetric measurements Licence: CC BY-NC-SA