A lighting module having {HEAD ~ an array} of {TAIL ~ 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 
A lighting module having { HEAD ~ an array } of { TAIL ~ 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
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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