Abstract: A divider bar for checkout counters includes a backlighting arrangement that senses motion occurring, for example, when the customers approach the checkout station or when the bar is moved for use by a customer. In the preferred embodiment the illumination serves to call attention to the advertising displayed within the divider bar. The bar is elongated and transparent with a polygonal, preferably rectangular or square cross section. At least one end of the bar has end caps equipped with a motion detector in close proximity that activate sources of illumination to emphasize advertising which can be viewed through the transparent walls of the divider bar. The circuitry and source of illumination is supported by a plate, which slides loosely and is positioned diagonally within the rectangular cross section of the bar. The transparent plate acts also to hold panels or sheets of advertising in position.