A modular shelf unit includes a shelf frame having a front, a back and right and left sides and a front panel rotatably coupled to the front of the shelf frame. The front panel is configured to rotate about a rotational axis located proximate to a bottom edge of the front of the shelf frame. The front panel includes at least one holder configured to hold sheet material and a plurality of lights located behind the at least one holder to illuminate the sheet material. When the front panel is configured into a rotatably opened position, the plurality of lights are turned off. When the front panel is configured into a rotatably closed position, the plurality of lights are turned on.