Interesting, I hadn’t seen those before. It took me a while to find an English data sheet for them. They sound pretty good on paper at least, though somewhat less so based on the earlier thread where you were discussing them. It doesn’t look like there’s an obvious supplier of WS2816 strips unfortunately and I haven’t yet tried any projects requiring SMD or custom PCBs, so personally I’m unlikely to try them anytime soon. Maybe other people here feel differently?