The “W” is the 4th LED, which is white (soft white 3000K or daylight white 5000K) … you can buy them with a specified Kelvin value. They do this because RGB (255,255,255) is not a very nice “white”.
The “W” is the 4th LED, which is white (soft white 3000K or daylight white 5000K) … you can buy them with a specified Kelvin value. They do this because RGB (255,255,255) is not a very nice “white”.