A headlamp is a portable lighting device worn on the head, typically secured with an adjustable strap. It features a light source, often an LED bulb, that illuminates the area in front of the wearer. Headlamps are commonly used for activities such as hiking, camping, and caving, providing hands-free lighting for tasks in dark environments. These devices are powered by batteries, which can be rechargeable or disposable. Many headlamps offer different brightness settings and beam angles, allowing users to adjust the light according to their needs. They are also designed to be lightweight and durable, making them suitable for outdoor adventures and emergency situations.