Doesnt pass but after more research on specifics of the rule, it should be the right structure and a good example.

There was a requirement that no squares be gray because that invites the potential for bulbs to be there and satisfy the black tile instead of having a too few bulbs contradiction.

prints "out of bounds" although for a 3x3 grid it should be within bounds

A test that completes 3 tiles and another test that completes 1 tile

Should add more examples but the basic one works