Abstract: A control panel for systems or processes, equipped with relatively shadow-free back illumination. The control panel includes a display panel, and a backing panel mounted behind the display panel to receive and support display interactive devices such as indicating devices or control devices. The display interactive devices may be equipped with magnetic bases for mounting on a steel backing panel. A source of back-lighting illumination is disposed behind the backing panel, and perforations in the backing panel allow the illumination to strike the rear of the display panel for relatively shadow-free back lighting.