The interior surface may further include {HEAD ~ a design element} that may be viewable on {TAIL ~ the exterior surface} only when the light source is illuminated 
viewable on
The interior surface may further include { HEAD ~ a design element } that may be viewable on { TAIL ~ the exterior surface } only when the light source is illuminated
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH