Home
Weather New York
WeatherRadar
RainRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
Career
    Home / Editor's Pick /

    In the base of a valley: A town that uses mirrors for sunlight

06:30 PM
November 18, 2023

In the base of a valley
A town that uses mirrors for sunlight

Settings for external content

Privacy policy

The days may be getting shorter, but at least we get natural sunlight, unlike a town in Norway that relies on mirrors to bring the sunshine.

Located at the bottom of a steep valley surrounded by mountains, the tiny town of Rjukan does not see sunlight for seven months of the year.

Rjukan was built between 1905 and 1906 by Sam Eyde. It was Eyde who dreamt of a giant mirror in 1913 to provide sunlight for the towns factory workers. Instead, a tramway, that is still in operation today, was built to give employees and their families access to the sunshine. In 2005, Eyde’s mirror project was revived by Martin Anderson.

Eight years later, three 182-square-foot mirrors controlled by computer-driven motors were installed to bring a 6,500 square foot area of winter sunshine to the town.

The mirrors are able to bring 80-100 percent of the sun’s light to Rjukan by tracking the movement of the sun and repositioning themselves every 10 seconds to keep the light consistent.

Although the mirrors are unique, Rjukan’s were not the first. In December 2006, the town of Viganella, in Italy’s Antrona Valley, celebrated a day of light after a steel sheet was installed to reflect sunlight between November and February.

Weather & Radar USA editorial team
More on the topic
EF-2 tornado pictured in Colorado
Saturday, April 18, 2026

World of Twisters

Tornado myths answered
Saturday, May 2, 2026

May astronomy outlook

The only Blue Moon of the year rises
A young woman is kneeling in a cornfield, tending to her plants
Sunday, April 26, 2026

WMO report

Heat is affecting agriculture globally
All weather news
This might also interest you
Saturday rainfall
Saturday, May 23, 2026

Flood danger increases

Downpours soak Texas, South
Heavy rain across Florida
Wednesday, May 27, 2026

Drought relief

Heavy rain hits Sunshine State
Rain soaked much of the South over the holiday weekend, and the unsettled weather continues through the rest of the week. Flash flooding is a concern as heavy rain falls in already saturated areas.
Tuesday, May 26, 2026

Downpours continue

Flood threat targets South
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy policy Legal info Accessibility statement

Services

Uploader

Socials

instagramfacebookthreadslinkList