Basically I just want to set up the same halo that a light has as a function on an emitter. I end up making a ton more lights than I need to for the sake of symmetry or visual effect, just because I like the way the light halos look. Allowing the halo sprites on the emitter menu would, pretty obviously, reduce lag.
I'd use the fire emitters but they're a little big.
Also, this is pretty simple and doesn't really require any new content. I'm pretty sure someone could whip up a mod for this in like five seconds, I just don't know how.