Method for electronic adjustment of illuminance of surgical lamp

A method of controlling a light output of a surgical lamp using a voltage sensitive device having light transmissive properties that change in response to a biasing voltage applied thereto, said surgical lamp comprised of a housing defining an internal cavity and a light source disposed within said internal cavity of said housing, said light source producing a light path and a light field at a surgical site that is remote from said housing, said method comprising the steps of:

• providing a voltage sensitive device along said light path, said voltage sensitive device having light transmissive properties that change in response to changes in a biasing voltage applied thereto;
• energizing said light source to create a light path to said surgical site and a light field at a surgical site, said light source creating an actual light intensity at said surgical site;
• comparing said actual light intensity at said surgical site to a desired light intensity;
• and
• modifying said biasing voltage across said voltage sensitive device to change said light transmissive properties of said voltage sensitive device until said actual light intensity at said surgical site is equal to said desired light intensity.