Home
Weather Dublin
WeatherRadar
RainfallRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
    Home / Editor's Pick /

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

12:00
18 November 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% 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 editorial team
More on the topic
Severe thunderstorms in northern Italy. Hail and storm damage. . . Wednesday 3 June 2026
A split-screen image showing fallen trees on a road and a weather radar map of northern Italy. Numerous thunderstorm cells are active between Turin, Milan and Bologna.
Wednesday 3 June 2026

Hail and storm damage

Severe thunderstorms in northern Italy
Thunderstorm risk to start the week. Popcorn storms. . . Monday 8 June 2026
Weather warning map of England showing a yellow thunderstorm alert area extending from northern England to the southeast, with lightning symbols across the region and a large warning triangle over the North Sea.
Monday 8 June 2026

Popcorn storms

Thunderstorm risk to start the week
Colourful skies and video moments. Your weather - Your shots. . . Sunday 7 June 2026
Split image showing a bright blue sky with scattered white altocumulus clouds above trees on the left, and a rainbow arching over a windy gray sea beneath dark storm clouds on the right.
Sunday 7 June 2026

Your weather - Your shots

Colourful skies and video moments
All weather news
This might also interest you
Turbulent weather in the Canary Islands. Storm and rain. . . Friday 12 December 2025
Weather graphic showing rain and wind fields over the Canary Islands and a central warning symbol.
Friday 12 December 2025

Storm and rain

Turbulent weather in the Canary Islands
Storm Chandra makes impact. Severe gales & heavy rain. . . Tuesday 27 January 2026
Split image showing strong winds over the UK on a forecast map and widespread rain and snow on a weather radar map.
Tuesday 27 January 2026

Severe gales & heavy rain

Storm Chandra makes impact
Seasonal warmth between spring thunder. Your weather - Your shots. . . Sunday 19 April 2026
Split image showing coastal sunset with layered lenticular clouds over rooftops and palm trees on the left, and a green valley with river and hills under soft daylight on the right.
Sunday 19 April 2026

Your weather - Your shots

Seasonal warmth between spring thunder
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

facebooktwitteryouTubelinkList