Light Spill

I’m a novice Artlantis user. I have rendered exterior light sconce models created in SketchUp. The Neon Shader is used for the light source. Please see attachment. What might be the reason for the light spill at the top / rear of the fixture?

it might be because there is a hole at the top ?

could you attach the zipped atla to this post ?

Looking for something like this? I think that is beneficial to me and many others.

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