NeoPixel Ring - 12 x 5050 RGBW LEDs w/ Integrated Drivers [Natural White - ~4500K] : ID 2852 : $9.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Pololu - Adafruit 15-LED NeoPixel 1/4-Ring
Use Adafruit NeoPixels With Home Assistant : 7 Steps - Instructables
Amazon.co.jp: Adafruit NeoPixel Ring - RGBW LED 1/4 x 60 - ネオピクセル リング (03 Warm White) : パソコン・周辺機器