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Why did Denmark change road lights to red?
Some Nordic countries, especially Denmark, have decided to replace the classic street lighting system that uses white light, with red diffused light models.
Street Light
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Topic archive
Articles about Street Light
22 published items.
Environment
Light pollution destroys astronomers' vision
According to a recent study by the British Rural Protection Campaign (CPRE), pollution is so bright that only half of people in the UK can see ...
Discover science
There were 9,999 rooms, why didn't Forbidden City have only one toilet?
In 1402, after leading troops from Beijing to capture Nanjing, Ming Cheng Zhou was crowned emperor.
Discover science
The light of street lights breaks the ecological balance
In a study published in the British Journal of Biology Letters on May 23, scientists from the University of Exeter, southwestern England said that street lights have a v…
Space science
Moon polishing project
A cosmetic company in Sweden has proposed a strange idea to reduce the need to use street lights at night: polish the surface of Ms. Hang.
Biology
The glowing tree can replace street lights
The sight of glowing trees on both sides of the road will not only appear in fictional movies thanks to a US study.
Scientific application
'Intelligent' lighting system
If the 'smart' lighting system tested at Delft University of Technology (Netherlands) succeeds, remembering to turn off the light becomes unnecessary.
Scientific application
Using energy saving technology for street lights
Installation of DIM-250 ST power saving device, each high-voltage lamp has saved 30-50% of electricity, 75W incandescent bulbs are replaced with Compac bulbs with a capa…
Environment
New street lamp design helps reduce light pollution
For astronomers, a city that is brightly lit, it is not a place to study the sky. Moreover, light pollution also affects nature such as the migration of birds, the hatch…
Environment
Waste into electricity lighting rural areas
For the first time in TT-Hue, Biogas made from polluted waste is used as lighting energy at many roads in Hue city, opening up the prospect of public lighting applicatio…
Environment
Too bright street lights increase crime
Light pollution not only harms the environment but also creates conditions for bad people to commit illegal acts.
Videos
Video: The world alerted to light pollution
In Paris, France, at the end of the 18th century, people lit only half of the city's street lights on every full moon night. This is due to economic reasons instead of t…
Medicine - Health
Green lights help prevent suicide and committing crimes
Psychological experts claim that blue street lights are able to effectively block suicidal thoughts and offenses.
Science invention
Forget to eat because
Small, smart and intelligent face, Phuong said that she has cherished the idea of researching energy-saving devices since she was a first-year student.
New technology
Nissan re-uses electric car batteries to illuminate the roads
Nissan is using an old Leaf battery to provide power to street lights to help make traveling of vehicles and pedestrians safer.