A personal control unit (PCU) for a transportation-based entertainment system comprises a number of buttons. Illumination is provided for the buttons by illuminating a border region that is rounded containing some of the keys, and is provided for some of the buttons themselves. A light diffusion mechanism is provided between the illumination source and the illuminated regions related to the keys so that the illumination appears even across the entire PCU. A controller may adjust the illumination level and color of the illumination source. A system may be provided for matching at least one of color and brightness of the PCU lighting with cabin lighting.