A color control signal converter interposed between a data source and {TAIL ~ a first color control input}, a second color control input, and {HEAD ~ a third color control input} of a variable color light emitting diode optical device, said converter comprising: 
A color control signal converter interposed between a data source and { TAIL ~ a first color control input } , a second color control input , and { HEAD ~ a third color control input } of a variable color light emitting diode optical device , said converter comprising :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH