The present invention relates to a mobile boom-mounted shop light, particularly adapted to use in connection with the maintenance and repair of all types of motor vehicles. The present invention provides for four separate degrees of freedom in positioning the light fixture by employing an articulated boom arrangement. The present invention comprises a mobile base, a vertical stand and a boom assembly comprising an arm, a light fixture and a counter weight. The boom assembly allows the light fixture to be rotated transversely about the upright longitudinal axis of the stand, to be rotated vertically, to be rotated about the axis of the boom assembly and to be pivoted from its position on the end of the boom assembly. The position of the light and boom assembly are fixed by a brake and friction plate mechanism.