An arm band case for portable electronic device is disclosed. The arm band case may be secured to the user with straps and includes a pocket having a transparent window that provides visibility to the touchscreen of the electronic device and a plurality of powered light sources that are configured to illuminate the arm band and thereby provide added visibility to the user when in use. The arm band case is formed of multiple layers that encapsulate the light sources while allowing access to the battery housed therein and while facilitating the transmission and dispersion of light to illuminate the arm band.