Electric light be made with a screw-thread base, two metal pins, two metal caps or a bayonet cap. The three main categories of electric lights are incandescent lamps, which produce light by a filament heated white-hot by electric current, gas-discharge lamps, which produce light by means of an electric arc through a gas, and LED lamps, which produce light by a flow of electrons across a band gap in a semiconductor. Before electric lighting became common in the early 20th century, people used candles, gas lights, oil lamps, and fires. Cornish chemist Humphry Davy developed the first incandescent light in 1802, followed
Definitive Collection (Electric Light Orchestra album) World Record", "Out of the Blue", one of the pictures in the booklet of "Balance of Power", and mostly "Secret Messages". All tracks written and produced by Jeff Lynne. Definitive Collection (Electric Light Orchestra album) Definitive Collection is a compilation album recorded by the Electric Light Orchestra (ELO) and produced by Jeff Lynne. It was released on 13 April 1999 with two discs. Some of the songs include their album versions like "Strange Magic" and "Shine a Little Love", and some tracks include edits seen below. Many edits are featured in this album. "Can't Get It Out of My Head"