He asked me over and over again what it was." (William D. Coolidge, General Electric scientist, 1909) Coolidge was recounting Fritz Blau's reaction to a lamp made with bendable (or "ductile") tungsten ...

Ordinary electric lamps contain a thin metal filament that glows when electricity passes through it. However, most of the electrical energy is transferred as heat energy instead of light energy.

I felt that if we ever got to the point where we knew how to control things and make it, we would replace standard incandescent lamps with halogens." -- Frederick Mosby, 1996 interview In late 1953, ...

Ordinary electric lamps contain a thin metal filament that glows when electricity passes through it. However, most of the electrical energy is transferred as heat energy instead of light energy.

However, the story doesn’t quite end there, because there are actually a few lamp-post chargers in Ireland. Ubitricity fitted ...