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 ...