Lighthouses and Their Light

A lighthouse is a tower designed to emit light for navigation.

A lighthouse is a tower marking dangerous coastlines.

Lighthouses warn of reefs and mark harbor entrances.

Ancient lighthouses started as fires on hilltop platforms.

The modern lighthouse era began in the 18th century.

Granite blocks provided sturdy durability.

Alexander Mitchell invented screw-pile lighthouses on seabeds.

Argand lamps gave lighthouses steady flames starting in 1782.

Fresnel lenses made lighthouse lamps four times brighter.

Automation changed lighthouse operations significantly.

Solar panels and LEDs power many modern lighthouses today.

Lighthouses still aid navigation despite GPS technology advances.

Lighthouses continue lighting the way for ships worldwide.