Nowadays, our company have design a new led chip , which have 4 chip inside 5050 smd , it is RGBW LED CHIP , there are Red, Blue ,Green , White/Warm White Chip inside , it is a new led chip , new technology , then the MIX color can be more different  , the color can be more beautiful , by the way , we also have develop RGBW LED CHIP addressable led strip ,they are 60leds 20ics , they can be UCS9812,  UCS2912 LPD1882   LPD6812 and so on .  about the parameter of those led chip ,you can visit this 

http://www.szledcolor.com/product/index/cid/428

RGBW LED CHIP Datasheet 

http://www.szledcolor.com/download/5050 RGBW LED chip.pdf