Light trails are visual effects created when a light source moves quickly across a camera's field of view during a long exposure photograph. This technique captures the path of the light, resulting in streaks or lines that can create dynamic and artistic images. Common examples include car headlights and taillights, which produce bright trails on roads at night. Photographers often use a tripod to stabilize the camera while adjusting the shutter speed to allow more light to enter. This method can also be applied to other moving light sources, such as fireworks or sparklers, enhancing the visual impact of the captured moment.