It looks like in one of the last revisions of B18 there was a change in wihch all the lights of a certain type will share one glow color. This is for space reasons i'm sure but it breaks this mod to an extent.
When adjusting one type of light's color, ALL lights of that same type will change color too. I'm going to look into a way to revert the change to allow individual lights, no matter the type, have a custom color.
Update B18
Updated to fix a bug where modded lights' colors would not be persisted when loading a saved game