{TAIL ~ The method} 1 further including the step of providing {HEAD ~ a protective, light transmitting coating} on the external surface of said defined envelope 
{ TAIL ~ The method } 1 further including the step of providing { HEAD ~ a protective , light transmitting coating } on the external surface of said defined envelope
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH