A surgical light system (10) includes a lighthead (44) coupled to a
suspension arm (41') adapted for mounting to a surface (14) of a surgical
room. A bulb (130) is disposed in the lighthead. A processor (120) in the
lighthead is operatively coupled with the bulb for controlling an
intensity of light of the bulb and is adapted to generate a lighthead
status signal representative of a first status of the lighthead. A
control apparatus (32, 34) is in operative communication with the
processor (120) in the lighthead. The control apparatus receives the
lighthead status signal and selects a set of control algorithms from
among a group of algorithms based on the lighthead status signal for
controlling the lighthead. The lighthead status signal includes
information regarding a size of the lighthead, an intensity of light from
the bulb, a condition of the bulb, a level of current applied to the
bulb, a level of current applied to the bulb, a level of voltage applied
to the bulb, an internal temperature of the lighthead, and the presence
of one or more of a video camera, a surgical task light, and a
controllable ambient light. A human-readable display device (160) is
provided for displaying information relating to the lighthead status
signal. Several levels of redundancy are provided in the control system
to minimize the potential loss of control due to failures. In that
regard, the lightheads are operable when the control apparatus (32, 34)
fails.