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
Electric Light Orchestra Live live tracks from the same performances, "Turn to Stone" and "Do Ya", were released as bonus tracks on various editions of their "Zoom" album reissue, which coincided with the release of "Electric Light Orchestra Live", while the track "Twilight" has been previously released as a Japanese bonus track on "" All songs written by Jeff Lynne, except where noted. Electric Light Orchestra Live Electric Light Orchestra Live is a live album by Electric Light Orchestra. It was released on 19 April 2013 in the UK, and on 23 April in the US on Frontiers Records. The album consists of performances