A hydrophobic gypsum composition is provided which contains gypsum, a granulated hydrophobing additive and a pH effecting additive in an amount sufficient to maintain the pH of the composition in the range of 8 and 12. A lamp dimmer circuit disposed within the fixture is in electrical communication between the AC line and a socket. It is preferable that the polyvinyl alcohol-based film has a dry-stretch ratio of at least 2, the film after relaxation has a stretch ratio of at least 1. By integrating the antenna in a plastic housing, the antenna cannot be seen at all from the outside.