{HEAD ~ A second reflecting surface} of {TAIL ~ an ellipse group} reflecting surface such as a rotated elliptic surface having a first focus located substantially on the light source and having a second focus at a predetermined position 
{ HEAD ~ A second reflecting surface } of { TAIL ~ an ellipse group } reflecting surface such as a rotated elliptic surface having a first focus located substantially on the light source and having a second focus at a predetermined position
HEAD HEAD 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 OTH OTH OTH