OH OK YOU DON’T UNDERSTAND THE BRILLIANCE THAT IS THIS EFFECT. OK.
AutoLuminous is an effect by そぼろ for MikuMikuDance using the MikuMikuEffect addon. You can download it [HERE].
HOW TO USE

OK so here is Miku. We want her hair to glow like a mofo.

Set the specular to black (0, 0, 0) and the shininess to 110.
Save, open the model up in MMD, load AutoLuminous.x, and THAT’S ALL.

The colors for the effect are automatically done by using the material’s diffuse and ambient colors, so there’s no need to edit the .fx file like with ObjectLuminous or KeyLuminous.
Which is why this effect kicks ass.