Claiborne turned the lens by hand crank and kept the Bolivar Light shining through that terrible night. With time, Galveston recovered. The Bolivar Light served the city until 1933, then was ...

The problem is that in those days, a lighthouse was an oil lamp, a concave mirror, and an ordinary lens. This made the lighthouses difficult to spot. Napoleon started the Commission of Lighthouses ...

Assuming these have been energized with enough sunlight during the day, it should make the lens usable at night, in minimal ambient light. This isn't the first time we've seen a lens with ...