Very rough example of making the windup Moon invisible and leaving behind the light source. I disabled the Kill function on the VFX to stop the Moons from disabling each other once one is spawned in. This is best used with Anamnesis, Ktsis, and Brio.
To change the color, use VFXedit and load up local file. [Penumbra mods location]\Gposer's Moon\Required\Stuff needed for gpose\chara\monster\m8057\obj\body\b0001\vfx\eff\vm0002.avfx
The color/brightness and other functions are located in the 'Effectors' Tab