gasljus

Gasljus, or gas lighting, is illumination produced by burning combustible gas in lamps and streetlights. The primary fuels were coal gas (town gas), produced at gasworks, and later natural gas. Gas lighting was adopted widely in the 19th century and remained common in many cities into the early 20th century, until electric lighting became predominant.

Production and distribution: Gas was generated by gasifying coal or other feedstocks, then purified and transported through a network of pipes to individual lamps. Lamps featured adjustable burners and, in many cases, mantles or other devices to increase light output. Street lighting often employed lanterns with globes and reflectors to improve visibility and safety.

Technology and operation: Early gas lamps relied on simple flames, but improvements introduced regulated air supply, better burners, and protective enclosures. The late 19th century saw the adoption of gas mantles, which heated a porous ceramic element to glow brightly, substantially increasing luminance without enlarging the flame.

Decline and legacy: Electric lighting gradually supplanted gas lighting from the late 19th into the mid-20th century due to higher efficiency, safety, and ease of use. Some cities retained gas networks for decorative or historical lighting, while others converted entirely to electricity. Gas lighting remains a cultural marker of urban history in places with preserved districts or heritage lighting.

Safety and maintenance: Gas lighting required regular maintenance and posed risks such as leaks, fires, and indoor air pollution. Today, gas lighting is mainly of historical, educational, or aesthetic interest.