Emergency backup lights are essential safety devices that provide illumination during power outages or emergencies. They automatically turn on when the main power supply fails, ensuring visibility in dark conditions. These lights are commonly used in homes, offices, and public buildings to guide people to exits and prevent accidents. Typically powered by rechargeable batteries, emergency backup lights can last several hours on a single charge. They come in various forms, including LED fixtures and portable flashlights. Many models also feature sensors that detect darkness, making them convenient and reliable for emergency situations.