For example, a GX53 type cap structure is used for the cap portion of {HEAD ~ the lamp device}, and a metallic material excellent in thermal conductivity may be used at least at a position where the cap portion comes into {TAIL ~ contact} with the heat radiating body 
For example , a GX53 type cap structure is used for the cap portion of { HEAD ~ the lamp device } , and a metallic material excellent in thermal conductivity may be used at least at a position where the cap portion comes into { TAIL ~ contact } with the heat radiating body
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH