This Grove - LED Pack includes 4 kinds of different colors of LED which are red, green, blue, and white. The LED can be easily plugged on the LED Pack, and there is a spin button that can control the luminance of the LED. The interface of this LED module is the Grove interface, you are strongly recommended to use Grove cable and Grove shield for getting started.
If the LED does not light up, try rotating the potentiometer with a screwdriver to increase the brightness.