Typically, but not necessarily, they are integrated to monitor the thermal conditions of a number of {HEAD ~ critical junctions} of {TAIL ~ the solid state light sources} 
of
Typically , but not necessarily , they are integrated to monitor the thermal conditions of a number of { HEAD ~ critical junctions } of { TAIL ~ the solid state light sources }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL