+1
That would drive me insane. We used to live across from house a that was half of the owners dental practice. He installed big ass lights like this, which was bad enough. But when mocking birds in the surrounding trees started confusing days/nights, squawking like a car alarm at 3 am, someone in the neighborhood bought a bb gun. We never figured out who it was, god bless them, but the dentist gave up after about the 10th set of bulbs.
Here is all the info you need, pulled from the link above.
Per MoCo Department of Housing: "Neighbor's Lights Shining Into Windows"
The property owner must direct any exterior lighting away from the windows of any adjacent dwelling unit or individual living unit. See Section 26-9(b)(6) of Chapter 26, Housing and Building and Maintenance Standards on the attached link for the Code reference. Light pollution is not addressed under the Housing code
To file a complaint regarding neighbor's lights shining into windows, please see the topic entitled "HOUSING COMPLAINTS" or click on the second link below.
http://www.amlegal.com/nxt/gateway.dll/Maryland/montgom/partiilocallawsordinancesresolutionsetc/chapter26housingandbuildingmaintenancest?f=templates$fn=default.htm$3.0$vid=amlegal:montgomeryco_md_mc$anc=JD_26
http://www3.montgomerycountymd.gov/311/SolutionView.aspx?SolutionId=1-3G15PN