Barbier, Benard, et Turenne

Barbier, Benard, et Turenne (BBT) was a French company founded in 1862, specializing in the manufacture of spotlights, Fresnel lenses for lighthouses, and lighting systems.

It became Barbier, Benard, et Turenne early in the 20th century, and became a public limited company in 1919.

[3][4] Barbier, Benard, et Turenne began with a specialty in the production of equipment for lighthouse beacons, such as Fresnel lenses.

[3] Eventually, the company manufactured buoys, metal towers, and fog sirens.

[3] BBT used its expertise in optics, lighting, and construction to expand into other businesses, including stadium and airport floodlights and streetlamps.