I love stuff like this. I once went way too far down a rabbit hole with addressable Christmas lights. https://blog.jgc.org/2011/11/turning-ge-color-effects-g-3

I love stuff like this. I once went way too far down a rabbit hole with addressable Christmas lights. https://blog.jgc.org/2011/11/turning-ge-color-effects-g-35-christmas.html https://blog.jgc.org/2011/11/turning-ge-color-effects-g-35-c... These are also serially linked but the first step is to give each lamp an address and then messages just get passed on until consumed by the appropriate lamp.