Lights are not displayed in Render mode Blender 2.8?

I don’t know whether this helps. Just try it.
Steps:

  1. Create a light
  2. Make a mesh similar to that light.
  3. Parent the light to the mesh.
  4. Give some emission to the mesh based on the watts of light.
  5. Now the mesh acts as light and in render, you will be able to see it.