https://balkanarchitect.com/p/light-families-in-revit

You will learn how to pick out the correct template for your family as well as how to model all geometry. Setting up the light source  Light sources are the most important part of creating a light family. You will learn how to set up the light source in such a way so it works in renderings as it would in real life. Tips, tricks and best practices  Light families are quite hard to understand and even harder to get to work exactly how you want them to, so in this course I will share many tips and tricks how to set everything up exactly how it should be.