Move a chair that has sat by a window for three years, and you may find a darker patch of floor underneath it. The rest of the floor has turned lighter or grayer. That uneven line is the clearest proof that sunlight changes materials slowly and steadily. It also leads to many wrong ideas about why it happens. Homeowners researching window UV protection Houston, TX options run into the same five myths again and again, and each one can lead to a poor buying decision. Myth 1: Gl