A operating light– also referred to as an surgical light or surgical lighthead – is to assist medical personnel during a surgical procedure by illuminating a local area or cavity of the patient. A combination of several surgical lights is often referred to as a “surgical light system”.Optical condenser in an indirect light was also tried to reduce the heating but without success. When the electric lights made their entrance into the operating room in the 1880s it also quickly showed problems. At this early stage of electricity the ability to control the light emitted was very low. The light created was still moving and diffuse with great heat radiation.