{HEAD ~ A lighting module} having {TAIL ~ an array} of light emitting elements on a substrate, at least one diffractive optical element arranged to receive light from the light emitting elements and partially collimate the light 
having
{ HEAD ~ A lighting module } having { TAIL ~ an array } of light emitting elements on a substrate , at least one diffractive optical element arranged to receive light from the light emitting elements and partially collimate the light
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH