New street lights may be more energy-efficient but they can increase light pollution Andie Bulman · CBC News · Posted: Jul 24, 2022 5:30 AM EDT | Last Updated: July 24, 2022 ...

Light pollution in the bedroom could raise sleepers' risk of heart disease, research claims. Exposure to light at night, from electronic devices, street lamps or poorly drawn curtains, is never ...

The province says 70 street lights illuminating Stoney Trail and Deerfoot Trail are turning blue (or purple) due to a manufacturing defect — and it has no plans to replace them.

More coloured street lights on Stoney Trail, in northwest Calgary. (Submitted by Tracy Walters) He said white LED bulbs naturally emit a strong blue or purple light — but that hue is absorbed by a ...