Barbier, Benard, et Turenne (BBT) is a French company founded in 1862, specializing in the manufacture of spotlights, Fresnel lenses for lighthouses, and lighting systems. It was world's leading producer of lighthouse beacons at the end of the 19th Century. The company was founded in 1862 by Frederic Barbier and Stanislas Fenestre as Barbier and Fenestre. It was renamed Barbier et Cie in 1887 and Barbier and Bénard in 1889. It became Barbier, Benard, et Turenne early in the 20th Century, and became a public limited company in 1919. It was dissolved in 1982.