How to make certain lights not affect certain meshs

Questions
1

I am trying to create A solar system in Babylon js using real-world values. Due to the sun being the light source only 1 side of the planets was visible I decided to add a backlight in the form a hemispheric light. Although this light also affects the sun and makes the sun mesh many times brighter. Is there any possible way to avoid the hemispheric light from updating the sun mesh as well? or another approach?
you can check out the code I used for the solar system in this playground - Solar System Playground

2

You can use the excludedMeshes property of the light:

3

Thanks A Lot !!!