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