Emilio Bool released a piece of code how to control the Wii Light.

Notes from Emilio:

Some people have been asking for the code to control the wii’s light so here it is.

It’s more of an example for anyone to understand what is going on.

It tricks your eyes into thinking you are seeing changes in light intensity, but actually it is just being turned on and off too quickly.

Whatever, here it comes the example.

http://blog.emiliobool.com/posts/wiilight_code/