The down feed tube is rigid and of a predetermined length, so that with {TAIL ~ one end} positioned with respect to {HEAD ~ the bottom} of the showcase, the other end will be within the lighting fixture 
The down feed tube is rigid and of a predetermined length , so that with { TAIL ~ one end } positioned with respect to { HEAD ~ the bottom } of the showcase , the other end will be within the lighting fixture
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH