It is useful for synchronizing light displays to music. For many examples of xlights in use, see also: https://www.metafilter.com/189822/More-than-a-few-fairy-

It is useful for synchronizing light displays to music. For many examples of xlights in use, see also: https://www.metafilter.com/189822/More-than-a-few-fairy-lights https://www.metafilter.com/189822/More-than-a-few-fairy-ligh...