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