Basic supplies include soda-lime glass tubing and pre-coiled tungsten filaments. Support wires are ... and pinched into a stem of glass tubing. A bulb is blown in another piece of tubing and ...

Today’s bulbs predominantly use tungsten filaments, a shift from the carbon filaments of the past. Tungsten, introduced in the early 20th century, has a higher melting point, which allows for ...

Invented in Britain and developed by William Coolidge, these bulbs swapped the hot, dim carbon filaments with a tungsten filament. The new bulbs burned much cooler and were bright enough to be ...

incandescent lamps with tungsten filaments appear on the European market. These bulbs lasted longer, were brighter and more efficient than lamps with carbon filaments. 1908: Edison screws Part of ...