This is a question that would probably be better answered on the Autodesk Community Forums.

It is typically called cove lighting or indirect lighting. In the past, it was accomplished using fluorescent tubes, neon tubes, or rope lighting. You can use LED tape to create this effect. The only real trick is to make the alcove big enough to get your hands in to install and maintain it. You may want to install an aluminum mounting track and light diffuser with the LED tape for a more even light. You can Google "cove lighting detail" or "indirect lighting detail" in images and get quite a few examples of the different construction methods.

We have many options for led strips. Let me know how bright you need them?