When the light source is illuminated, however, {HEAD ~ light} is transmitted from {TAIL ~ the light source} 210 and through the body 100 
When the light source is illuminated , however , { HEAD ~ light } is transmitted from { TAIL ~ the light source } 210 and through the body 100
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH