The Kindle automatically alters its backlight to suit changing conditions. When a lot of light falls on the screen, the backlight brightens to block reflections. In less light, the backlight dims. If you aren’t satisfied with the way your Kindle adapts to changing light, you can increase the strength of its backlight manually. A strong backlight increases the clarity of text, helping you read your Kindle’s screen. However, note that bright light taxes your eyes and drains your Kindle’s battery. Writer Bio
