The Paradigm Shift: Moving From ‘More Light’ to ‘Right Light’
For decades, the logic of urban development was simple: more light equals more safety and more activity. Though, we are now entering a paradigm shift. Experts, including Are Røysamb from the University of South-Eastern Norway (USN), argue that the belief that increasing illumination automatically improves a city is no longer sustainable.
The future of urban planning is shifting toward “precision lighting.” This means moving away from blanket illumination and toward a strategy focused on better shielding, lower light levels where possible, and smarter control systems. The goal is to provide light only where it is needed, when it is needed, and in the correct spectrum.
The LED Paradox: Efficiency vs. Over-Illumination
The transition to LED technology was hailed as a victory for energy efficiency. However, this efficiency has created a “rebound effect.” Because LED lighting is cheaper to operate, many municipalities and private actors have simply installed more of it, or increased the intensity of existing lights.
Data shows that blue light from LED armatures in Europe increased by an estimated 24 percent between 2012 and 2020. This specific spectrum is particularly problematic because light in the blue part of the spectrum inhibits the production of melatonin, the hormone responsible for regulating our biological clock.
The Biological Cost of a Bright Night
Light pollution is not just an issue for astronomers; it is a biological disruptor. “Ecological light pollution” affects entire ecosystems, while “nuisance lighting”—such as glare and light intrusion—impacts human health.
Impact on Human Health
When streetlights, billboards, or facade lights shine directly into bedroom windows, they reduce sleep quality. By suppressing melatonin, artificial light at night can make us feel awake when we should be sleeping, disrupting the circadian rhythm.
Threats to Biodiversity
The natural world relies on the dark. Artificial light confuses insects, disrupting their navigation, reproduction, and pollination patterns. Similarly, nocturnal animals like bats and birds can experience altered behavior and a loss of critical habitats.
Norway as a ‘Light Heavyweight’
Despite its reputation for nature, Norway stands out as one of the countries with the highest light emissions per inhabitant. Reports indicate that five Norwegian regions are among the 25 most light-polluted in Europe, with Finnmark and Troms specifically highlighted.
Major cities including Oslo, Bergen, Trondheim, and Tromsø have seen marked increases in light emissions. Growth is particularly evident along main roads and transport corridors. While snow and clouds can make satellite measurements complex, the trend toward increased artificial brightness is clear.
For more on how environmental changes are affecting infrastructure, see our coverage on why water power plants may require to be operated differently.
Can Policy Restore the Dark?
The trend toward brighter nights is not inevitable. Policy changes have already proven effective in other parts of the world. France, for example, has seen reductions in light pollution by implementing policies where cities turn off street lighting after midnight.
In Norway, the government is beginning to focus on sustainable outdoor lighting. Minister Kjersti Stenseng has emphasized that while artificial light is an invaluable tool for safety and health, it must be used with wisdom to ensure future generations can still see the stars.
The future will likely see a stronger link between scientific research and urban regulation, moving toward a “dark-sky” approach that balances human needs with ecological preservation. You can read more about emerging technologies and security in our piece on laser defenses against drones.
Frequently Asked Questions
Light pollution is the misuse of artificial light—using too much of it, placing it in the wrong location, directing it incorrectly, using it at the wrong time, or using the wrong light spectrum.
Blue-spectrum light inhibits the production of melatonin, which regulates your body’s biological clock. This can make it harder to fall asleep and reduce the overall quality of your rest.
No. While “astronomical light pollution” hides the stars, “ecological light pollution” harms wildlife and “nuisance lighting” affects human health and sleep.
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