The light source module 1 wherein said heat radiating surface has a metal layer formed on {TAIL ~ said surface} on said other side of {HEAD ~ said wiring board} 
The light source module 1 wherein said heat radiating surface has a metal layer formed on { TAIL ~ said surface } on said other side of { HEAD ~ said wiring board }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD