How do I make it so that certain lamp(s) only effect one object in a scene
This is a good question, I too would like to hear an answer. 
Separate and exclude.
Send ball and light to it´s own collection.
The bk collection, right click over the outliner and collection>Exclude.
Also you can use render layers.
Too long to explain, but these main topics should get you going.
Go to the Blender user manual and search: exclude from collection.
Thank you for your help, but I would need a more detailed explanation. Maybe some tutorial?
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