Comment: You cannot solve a problem

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You cannot solve a problem

unless you can define it. You have defined that you dont like the light in your backyard but have not defined why your neighbor likes the light to be so high. If she likes a lighted backyard she can get that even if she lowered it and added a couple more if needed. Ask her why she likes the light so high and if you can find a solution for her that is better for both of you.

Do your best have no expectations