When running at night, runners have the ability to do their workout when the weather is pretty mild. It might seem like the best way to go about it, but it can also be a safety issue if a person does not properly dressed. That means dressing in bright clothing, and also using safety lights for runners whenever possible.
It can be pretty difficult for a car to see a runner late at night. In order to help them out, making yourself as bright as possible is a great way to do that. Getting in any type of accident with a vehicle can spell danger for a person on foot.
Not only should lights be used in darkness, but during dusk hours as well. Some people will even use them early in the morning since people are just waking up and might not be as sharp seeing pedestrians.