School lighting has in the past been relatively straightforward since the
predominant occupation has been one of reading dark letters (print) on a light (paper) background. However, with the prolific installation of video display units (VDU's) in schools and colleges, presently and anticipated in the future, the task now becomes one of reading light text on a dark screen. Thus the level and technique of lighting needs to be reassessed in order that VDU screen problems can be reduced or effectively eliminated. Problems arise not just from a bad or inefficient lighting system, but also from its interaction with the surrounding environment, i.e. wall surfaces, windows and furniture. Whether the terminals are installed in existing classrooms or designed for new ones, this article will allow the computer studies instructor to identify and implement the key characteristics which contribute to an efficient and comfortable VDU lighting installation.