It fits on any toilet bowl, and has 16 colors, five brightness levels, and a 170 degree radius.
Promising review: “At first I thought that the idea of an illuminated toilet bowl was funny. However, given the choice of an illuminated toilet bowl, turning on the light, or missing, an illuminated toilet bowl is a great idea. This unit is much better than the first I used because there are no suction cups (which never stay attached) and it use AA batteries instead of AAA, and it has a five-level dimmer for middle-of-the-night eye comfort.” —William D.
Get two from Amazon for $23.99.
Source: https://www.buzzfeed.com/elizabethlilly/fun-weird-products