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