Good morning and Happy New Year! I am very familiar with your kind of problem. What your neighbor is doing actually has a name. It is called "light trespass," and it is such a well-known problem that many outdoor lighting manufacturers actually make special fixtures to avoid the problem.
You have two options. One is to contact your local building department and complain. Many communities have "nuisance" statutes under which your neighbor could be issued a violation. Your other option is to take your neighbor to court on a cause of action for nuisance (the nuisance being the "light trespass" of his fixture onto your property).
Your neighbor can easily fix the problem in a couple of different ways. One way is to attach a shield or visor onto his fixture which will block the light from going over the fence. The other way is to re-aim or re-located the fixture so it does not face your property.
I hope this helps!
I think this is the kind of case you can handle yourself, without a lawyer. But first complain to your Building Department or Code Enforcement officer, because most likely, your neighbor is violating a local ordinance.
If you feel I have been helpful, please click "accept." Thank you!
DISCLAIMER: Answers from Experts on JustAnswer are not substitutes for the advice of an attorney. JustAnswer is a public forum and questions and responses are not private or confidential or protected by the attorney-client privilege. The Expert above is not your attorney, and the response above is not legal advice. You should not read this response to propose specific action or address specific circumstances, but only to give you a sense of general principles of law that might affect the situation you describe. Application of these general principles to particular circumstances must be done by a lawyer who has spoken with you in confidence, learned all relevant information, and explored various options. Before acting on these general principles, you should hire a lawyer licensed to practice law in the jurisdiction to which your question pertains.
The responses above are from individual Experts, not JustAnswer. The site and services are provided “as is”. To view the verified credential of an Expert, click on the “Verified” symbol in the Expert’s profile. This site is not for emergency questions which should be directed immediately by telephone or in-person to qualified professionals. Please carefully read the Terms of Service (last updated February 8, 2012).