Flexible RGBW LED Strip (NeoPixel/WS2812/SK6812 compatible) - 30 LED/Metre | The Pi Hut
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SK6812 RGBWW : How to connect to a RPI3B+ ? - Hardware Support - Hyperion-Project Forum
SK6812 (WS2812B ECO) Arduino Uno Individually Addressable RGB LED Strip Lighting - DC5V 144LEDs 3.28Ft [SK6812-5050RGB-144W12] - $16.99 :
DIYmall SK6812 5050 RGB LED, Built-in Driver IC Addressable WS2812B LEDs for Arduino ESP32 DIY Project (Pack of 20pcs)