The device 8, wherein the selected cross fading level is fifty percent of the available power to {HEAD ~ the first lighting source} and fifty percent of the available power to {TAIL ~ the second lighting source} 
The device 8 , wherein the selected cross fading level is fifty percent of the available power to { HEAD ~ the first lighting source } and fifty percent of the available power to { TAIL ~ the second lighting source }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL