Abstract: An illumination device for a toilet provides increased lighting conditions when a toilet seat or a toilet lid of a toilet is raised, thereby minimizing the chances of males urinating outside the confines of a toilet bowl and females sitting directly on a toilet bowl instead of the toilet seat during reduced lighting conditions in a bathroom. The illumination device may include a power source, a light source, and an activation device. The illumination device may be mounted to an underside of the toilet seat or the toilet, or the toilet itself. The illumination device may further include a controller in communication with the power supply and the light source, such that the controller regulates the passage of power and signals to the electrical components. The embodiment with a controller may include a courtesy alarm to warn users of a toilet seat in an upright position.