Fluorescent lamp or tube
Fluorescent lamp or tube: electric discharge lighting utilizing glass tubing manufactured to standard lengths. A type of lamp in which the light is produced by the fluorescence of phosphor coating in the tube. In a fluorescent lamp, the tube is coated with phosphors and then filled with a mix of argon and mercury gases. When electrical current passes between the electrodes at either end of the tube, the gas mixture emits ultraviolet light. The uv light is absorbed by the phosphors, which then radiate the energy as visible light. A starter and ballast within the lamp help provide the extra voltage necessary when the current is initially supplied to help ionize the gases in the tube. Fluorescent lamps are more efficient than incandescent bulbs and are a popular source of
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