Just change your character’s material to neon. I don’t think it’s possible to determine what parts get light and what parts don’t while using an actual light.
You have to change its colour too. If it’s dark, it won’t work. Also, the package has to be a basepart with no textures as mesh textures don’t work with transparent portions and whatnot.
What I’m making is that you can transform back into your normal character after a button press, If I remove the textures how would I put them back onto the character?