Light shelves have been considered in several studies as effective solutions for redirecting the daylight. They are architectural elements that can be placed horizontally on the exterior and / or the interior of a vertical opening in side-lit spaces. They offer a variety of design solutions, as they can come in different shapes, flat or curvy, static or dynamic. The reflective surface redirects a significant part of the incoming light flux towards the ceiling and then it is diffused in the deeper space. Therefore, they improve the uniformity of the daylight, reduce glare, work as shading system, while they do not block the view. In addition, they reduce a building’s energy consumption, as the needs in artificial lighting, heating and cooling are less and they improve life quality. The purpose of this research is, firstly, to present a review of light shelves and provide an overview of methods and techniques that previous works used. Moreover, a case study is implemented in a typical office in order to examine the impacts of light shelves, drawing conclusions.