A free app for Android, by Colorwork Apps.

Reading Light is a free app for people who like to read. It turns your phone into a bright, colorful light source that can be used for reading books, newspapers, magazines, and any other kind of text. Just tap the screen to choose a color and the brightness level, and the app will do the rest. You can adjust the brightness by using your device’s brightness adjustment, but it also gives you the option to use your phone or tablet as a light source.

It’s perfect for people who like to read in the car, on the go, or in a dark room. It can also be used as a reading light for people who need to read in bed or at a desk.