The light that is commonly mounted on a helmet is called a headlamp or headlight. Headlamps are portable light sources that are worn on the head, typically attached to a helmet or headband, to provide hands-free illumination. They are widely used in various activities and professions where individuals need to work or navigate in dark or low-light conditions.
Headlamps usually consist of one or more light-emitting diodes (LEDs) or an incandescent bulb, a reflector or lens to focus and direct the light beam, and a power source such as batteries. LED headlamps are more common today due to their energy efficiency, longer battery life, and compact size.
Headlamps are versatile tools and find applications in various fields such as outdoor activities like hiking, camping, and running, as well as professional work environments like mining, caving, construction, and emergency services. They provide convenient and adjustable lighting that allows individuals to have their hands free to perform tasks or move around while having a focused beam of light directed wherever they look.
The design and features of headlamps can vary, including adjustable brightness settings, beam distance and angle adjustments, waterproofing, and rechargeable batteries. Some headlamps also have additional features like red or green light modes for preserving night vision or strobe modes for signaling purposes.
Overall, headlamps are practical and convenient light sources mounted on helmets or headbands, providing illumination and enhancing safety in a wide range of activities and professional settings.