Radiant History

Flagstaff, Arizona's lighting ordinance is one of the oldest and most comprehensive in the United States. In 1958, the city passed this ordinance to preserve the natural beauty of the night sky and prevent light

The carbon arc lamp was invented in the early 1800s by Humphry Davy. The lamp consists of two carbon rods that are positioned close together but not touching, with a source of electricity applied between

The Davy Lamp is a unique invention that was created by Sir Humphry Davy, an English chemist, in the early 19th century. This lamp was specially designed for use in coal mines, where explosions due

Edison vs. Swan: Who REALLY invented the incandescent light bulb?

Carbon filament is a type of filament that was used in early incandescent light bulbs. The development of carbon filament is a story of innovation and ingenuity. The carbon filament was first used in electric