Ever wondered what the red light on the back of your favorite Formula 1 car was for? The answer is a bit more complex than ...

Are your AirPods flashing green? What does that light mean exactly, and what can you do to fix it if you encounter it? 5 reasons why your AirPod case is blinking green, and how to fix it.

A blinking green light in Vancouver means that the signal is was activated by a pedestrian and so could change if someone who wants to cross the road presses the button.

Blinking yellow arrows light up Lee traffic horizon Spurred by T-bone style car crashes when motorists act impulsively when a full green light seems to say it's OK to turn left, Lee County has ...

Instead of the standard red-yellow-green sequence, the Hawk signal has added some new variations.

Sometimes, you might see a green ring of light on your Amazon Echo. It doesn't mean anything's wrong—but if you don't like the light, there's an easy way to turn it off.