Red streetlights have begun appearing across city streets in Turkey, marking the start of a seasonal initiative aimed at improving nighttime visibility and safety.
The change, which involves replacing standard white or yellow bulbs with red-tinted lighting in select areas, is part of a broader effort by municipal authorities to reduce glare and enhance visual comfort for pedestrians and drivers during evening hours.
Officials say the shift to red lighting is intended to minimize disruption to circadian rhythms while maintaining sufficient illumination for security and navigation. Red light has a longer wavelength and is less likely to suppress melatonin production compared to blue-rich white light, making it a preferred option in environments where nighttime alertness and sleep health are concerns.
The rollout began in early April 2024, with installations reported in several urban districts including parts of Istanbul and Ankara. Municipal workers have been replacing fixtures on major thoroughfares and near residential zones, particularly in areas with high foot traffic after dark.
While the initiative is not yet nationwide, early feedback from residents and traffic safety experts has been positive, with some noting reduced eye strain and improved contrast perception under the new lighting.
Health professionals have long studied the impact of artificial light at night on human biology, particularly its effects on sleep patterns and metabolic health. The American Medical Association has previously warned about the potential harms of excessive blue light exposure after sunset, advocating for warmer, lower-intensity lighting in public spaces.
By adopting red-tinted streetlights, Turkish cities are aligning with growing international interest in circadian-friendly urban design. Similar pilots have been tested in parts of Europe and the United States, where municipalities explore lighting solutions that balance safety with biological well-being.
The project remains under municipal oversight, with no federal mandate currently in place. Authorities plan to monitor energy apply, public response, and safety metrics over the coming months to determine whether the initiative will expand to additional neighborhoods.
