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