Sensors 112 are employed to monitor one or more thermal conditions of {HEAD ~ one or more regions} or {TAIL ~ locations} of one or more of light sources 102 
Sensors 112 are employed to monitor one or more thermal conditions of { HEAD ~ one or more regions } or { TAIL ~ locations } of one or more of light sources 102
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH