Abstract: A light board includes a clip assembly, an electro-luminescent panel, a power supply, a power switch, and an operating circuit. A worksheet of transparent material may be placed against the light board, and optionally secured to the board using the clip assembly. Once the worksheet is positioned against the light board, the EL panel may be turned on by supplying power from the power supply through the switch to the operating circuit, which in turn, causes the EL panel to emit light behind the adjacent worksheet. The light board provides even, efficient light which is useful in viewing any planar transparent sheet of material, such as photographic and radiographic transparencies, graphic art work, and maps and charts.