It would be nice for Exult to produce better lighting effects than it does now.
Attached is an example of format read by Exult and ES and approximate shapes needing light sources. I haven't tested all of them nor is U7 very good at having things that should be light sources actually produce light.
Marzo added something like this yesterday in c711371b - I'm assigning him this FR as you added some light sources he missed AFAICT
tracking this in pull request https://github.com/exult/exult/pull/810