Question for the experts:
Are there any existing mods for the in-game FX that add/increase lighting?
For instance El Diablo's projectiles generate light on impact, whereas Arcane Bolt does not. Blackjack's Rapid Fire generates a small light when thr muzzle flashes. Do any existing mods enhance these effects?
Not an expert on fX's but Looking a them before each comes in either two or three different nifs - always start and core, and sometimes end.
Most if not all should have a texture tied to it and material for it. If you right click on the material, you can set how bright the nif shows up in game - probably increasing emissive, but maybe diffuse or ambient. move the dot on the bottom of the pyramid to the right to make it brighter. changing the texture from say a red color to a blue color ought to at least change the fx's color.
You could try mix and matching - using the end nif of Diablo's fx and copying it over to another fx. changing the texture should change the color. I'm not sure this would work though
Since the nif runs an internal kf as it takes effect, that might block you since I'm not sure how that changes color and light over time.
Good luck