In another practical embodiment of {HEAD ~ the lamp} according to the invention, the discharge vessel has {TAIL ~ an identical construction} 
In another practical embodiment of { HEAD ~ the lamp } according to the invention , the discharge vessel has { TAIL ~ an identical construction }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL