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
Royal Bath and West of England Society the Royal Bath and West Show, which in 2005 attracted 150,000 visitors. The current president of the society is HRH The Countess of Wessex. The Royal Bath and West Showground is the location for many events throughout the year, including the New Wine summer conferences. John Billingsley (agriculturist): One of the founders of the Bath and West Society Royal Bath and West of England Society The Royal Bath and West of England Society is a charitable society founded in 1777 to promote and improve agriculture and related activities around the West Country of England. Based at the Royal Bath and