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