How do you dim string lights, LED string lights, and also how do you use a timer and dimmer with LED string lights? The flickerSong, when not performing a music light show is a versatile dimmer and timer with NIST precision. Ten events per flickerSong can run independently of the flickerSong App to turn on, off, Play or Loop sequences to a 50 milliSecond NIST coordinated accuracy. Indeed, your lights and all the lights in your neighborhood or even city can turn on at exactly the same moment you program.