In a windowless bathroom, insufficient light isn't your only problem. Tubs and showers, toilets and sinks—those fixtures that make the bathroom a bathroom—all share one thing in common. They generate humidity. So long as it’s controlled, humidity isn’t a problem. But if there’s insufficient ventilation in the bathroom, humidity only adds to the cave-like quality of a small, gloomy bathroom space. Humidity also leads to mold and mildew, both of which are damaging to the home (not to mention your health). Fortunately, you can rescue a bathroom that's both dark and damp by installing a Solatube Daylighting System with the optional vent fan add-on kit. Here, a single streamlined Solatube fixture solves both problems, and you don't have to live with the eyesore of a ceiling cluttered with multiple fixtures. Add in the optional light kit, and Solatube provides natural light during the day, supplementary electric lighting at night, and around-the-clock bathroom humidity control—all in one fixture!