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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
BootySnorkeler
You can save power with this... but there is a big but: from a different thread I get the understanding that powering on a string starts with all leds powered, and then you have to send out at least one complete string of RGB byte sets to turn all off (with the ones you want to have lit kept on). The spike you get in the beginning could be significant... How many pixels will be in your link?