Some chinese vendors have started shipping a new led chip called TM1814 which is 12V and RGBW:
http://www.witop-tech.com/product-item/tm1814-programmable-digital-rgb-12v-rgbw-rgbww-led-strip/
Has anyone got it working with FastLED?
They list Arduino support but they can’t supply code examples or the required libraries so want to make sure it works before giving these a go.