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