{TAIL ~ A lighting device} includes {HEAD ~ a first lighting source}, a second lighting source, and a controller 
{ TAIL ~ A lighting device } includes { HEAD ~ a first lighting source } , a second lighting source , and a controller
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH