light linking would be so good to have. a lot of blender users seem to feel the same way: https://developer.blender.org/T68915
brecht lommel has a comment in this thread. it would be interesting to know whether light linking will finally be implemented and ideally soon. it is also one of the first things that Jeremy Birn mentions in the digital lightingi book that Jonathan recommends in this lesson (and there is a section on it in Chapter 2).