A mains electricity (AC-powered) device designed for use in dentistry to project an intense and focused beam of light directly into or around the oral cavity of a patient via a fibreoptic cable to illuminate the site of a dental examination or procedure. The illumination is produced by the light source of the device, a dedicated light bulb, and is transmitted via the fibreoptic cable which is attached to a dental handpiece held, or a headband worn, by dental staff. This is a reusable device.