Since the end of the 19th century we have been using electric light. Since then a lot has happened.
While light used to be only for lighting, today it also has a creative function.
As early as 1876, Ferdinand Braun gave a lecture on the conduction of electricity through crystals. After several scientists examined this special event, and only in 1935 said phenomenon as "Lossew light" (Russian physicist Oleg Lossew) found a name, only in 1951 with the development of the transistor scientific advances in semiconductor physics could be achieved.
In the early 1960s, the first LED (light emitting diode) was developed.
