{TAIL ~ The reflective and non reflective surfaces} 92, 94 can be achieved by painting the inner surfaces of {HEAD ~ the walls} of the light trap structure 42 with appropriate reflective and non reflective paint  
{ TAIL ~ The reflective and non reflective surfaces } 92 , 94 can be achieved by painting the inner surfaces of { HEAD ~ the walls } of the light trap structure 42 with appropriate reflective and non reflective paint
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH