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