SK6812RGBW/ SK6812RGBY is 4chips in 1 5050 package led chip. It is consisit of Red, Green, Blue, White/Yellow colors inside one 5050 led with sk6812 IC built-in. So this SK6812RGBW/SK6812RGBY SMD LED not only can achieve the digital rgb emitting effect, but also can achieve the digital white/yellow emitting effect as you like.