a target surface arranged at {HEAD ~ a distance} from {TAIL ~ the lighting module} to receive a uniform distribution of the partially collimated light 
from
a target surface arranged at { HEAD ~ a distance } from { TAIL ~ the lighting module } to receive a uniform distribution of the partially collimated light
OTH 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