Protective cover for ceiling and wall mounted fixtures

A protective cover and fixture assembly comprising:

• a fixture including a mounting portion and a primary structure, and the mounting portion being structured and disposed for mounting the fixture to a ceiling or wall, and the mounting portion having a first outer periphery, and the primary structure having a second outer periphery, and the second outer periphery of the primary structure being significantly greater than the first outer periphery of the mounting portion;
• a cover device including a main body and an open mouth surrounded by a top rim, and the main body surrounding an interior chamber that is sized and configured to surround the primary structure and the mounting portion of the fixture, and the open mouth communicating with the interior chamber and being operable between a fully open position and a contracted position, and the open mouth being sized and configured to allow passage of the outer periphery of the primary structure therethrough and into the interior chamber when the open mouth is in the fully open position;
• a closure mechanism on the top rim for operating the open mouth between the fully open position and the contracted position;
• and
• a releasable attachment mechanism on the top rim for releasably attaching the top rim to the mounting portion of the fixture.