If you've ever wondered how traffic lights work and how they can detect your car, you've probably also been curious about those small blue lights mounted above the signals themselves. These blue ...

Years ago, if you were to ask a child to draw a police car, you would undoubtedly get a picture of a black and white vehicle—probably a Crown Vic style—with red and blue flashing lights. Today, ...

Across the United States, drivers are looking up at intersections and noticing a new, unfamiliar glow: small blue lights ...

You might have seen traffic lights in Japan that are a little different to what you're used to. Instead of being red, amber, and green, the last light on the signal might be blue, or perhaps an ...

Poor lighting often gets overlooked in the workplace, as we talk about mental health and well-being, and the focus is firmly on creating happier and healthier workplaces. But bad lighting is ...

Blue light protection technology is becoming popular for protection from light emitted by computer, smartphone, and tablet screens, as well as televisions and even energy-efficient LED lights. While ...

Readers share their best holiday light pictures for the latest photo challenge, capturing the magic of Christmas in 2025.