{TAIL ~ The sign board} may be illuminated by {HEAD ~ ultraviolet light} from either or both sides to provide an attention getting, multi color display 
{ TAIL ~ The sign board } may be illuminated by { HEAD ~ ultraviolet light } from either or both sides to provide an attention getting , multi color display
TAIL 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 OTH