{TAIL ~ The heat} conducted to the projection portion 42 is efficiently conducted from the end face 43 of the projection portion 42 to {HEAD ~ the fixture body} 12 and radiated into air 
{ TAIL ~ The heat } conducted to the projection portion 42 is efficiently conducted from the end face 43 of the projection portion 42 to { HEAD ~ the fixture body } 12 and radiated into air
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH