So, good news and bad news. In the code under "Residential Compatibility Standards," it says this:

916.07 - Lighting
All lights used by development that is subject to
Residential Compatibility Standards shall be arranged and controlled so as to
deflect light away from any lot that is zoned RSD, RSA, RT, RM, or H. Any light
or combination of lights that casts light on a public street shall not exceed
one (1) foot-candle (meter reading) as measured from the centerline of such
street. Any light or combination of lights that cast light on a lot zoned R1D,
R1A, R2, R3, RM, or H shall not exceed 0.4 foot-candles (meter reading), as
measured no more than three (3) feet inside the lot line of a lot that is zoned
R1D, R1A, R2, R3, RM, or H.

That's the good news. They are not allowed to do that at all. The bad news is, its a PITA to get PLI to enforce RCS. Start with 311, though.