{TAIL ~ Projectors} are arranged on, in, or about {HEAD ~ the structure} to project light toward the object 
{ TAIL ~ Projectors } are arranged on , in , or about { HEAD ~ the structure } to project light toward the object
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH