The Rise of Purple Streetlights: Understanding the Unforeseen Consequences of LED Streetlight Technology.

The article discusses the change in street light color from yellow to purple in the US, attributed to the breakdown of a filter layer in white LEDs. This is a result of a lack of quality control in the conversion to LEDs, leading to a harsh, blueish white light that turns purple over time. The article suggests that municipalities could rectify the issue by replacing the faulty LEDs with new ones.