Artificial lighting technology began to be developed tens of thousands of years ago and continues to be refined in the present day.
Lighting through the ages (legend)
Arc lamp
Videos
An arc lamp or arc light is a lamp that produces light by an electric arc.
The 15 kW xenon short-arc lamp used in the IMAX projection system.
A mercury arc lamp from a fluorescence microscope.
A krypton long arc lamp (top) is shown above a xenon flashtube. The two lamps, used for laser pumping, are very different in the shape of the electrodes, in particular, the cathode (on the left).
A krypton arc lamp during operation.