I got a problem with particles lit by light sources.
In my case I want to display a lot of floating particles that should be lit up by different light sources (spot lights & point lights).
Somehow it seems that the light “overshoots” it’s boundaries which kinda kills the light cone effect I am looking for.
I tried to reproduce this behavior and my particles are lighting as you are requesting. I tried both CPU and GPU particles because I was not sure which you were using. Can you check to make sure that you have your particle materials are set to Default Lit? Also let me know if you are using 4.4.3 or 4.5 Preview?
I was using a Translucent Material. I have attached my working project, can you test and see if you get the same results? (I set up a Matinee all you should have to do is Play in Editor or click and drag the spotlight in the level.)link text