Preventing rays from appearing along the edge of the screen?

[TheConceptBoy]

Good day, everyone.

This is the view on the directional light.

This is the view when I look down and the light is no longer within view.

You can observe here that the god-ray is lighting up even though we're not looking at the light. Is there a way we can not make the edge of the screen be interpreted as edges of the godray?