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 President 2008, the album leaked on file-sharing networks. In 2009 Electric President left Morr Music and released their third album, The Violent Blue, with Fake Four Inc. The album was largely made up of songs left over from the making of the groups previous album, "Sleep Well". After "The Violent Blue", "Electric President" went into hiatus as Alex Kane wanted to further his career and Ben Cooper focused on other projects, like Radical Face. Electric President's mix of glitch, electronica and indie songwriting has been compared to The Postal Service, Styrofoam, The Weakerthans and Anticon's cLOUDDEAD. In 2013, Ben Cooper announced