Abstract: A display lamp is provided with a generally cylindrical illumination tube, which serves as the source of light. A housing with a generally U-shaped cross section is secured over the tube so as to act as a decorative enclosure and a reflector for the tube. The housing is somewhat shorter in length than the tube and the ends of the tube protrude beyond the housing. The lamp also includes a pair of mounting members, each of which includes a generally flat top wall and a pair of depending, opposed legs which are spaced apart by a distance equal to the outside diameter of the protruding end portions of the light tube. The top surface of the top wall is provided with an adhesive for securing the lamp to the shelf. The depending legs are shaped so as to engage and retain the protruding portions of the light tube. When so engaged, the light tube and housing are rotated together so that the interior reflecting surface of the housing directs the illumination from the light tube as desired.