In operation, when viewing the exterior surface of {TAIL ~ the lamp}, {HEAD ~ a viewer} sees only a portion of the complete image when the light source is extinguished  
In operation , when viewing the exterior surface of { TAIL ~ the lamp } , { HEAD ~ a viewer } sees only a portion of the complete image when the light source is extinguished
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH