In this speech, the author traces the history of lighting in schools, discusses the variables affecting the amount of illuminance needed, and provides a table of illuminances recommended for Ontario schools. Other factors that affect vision--glare, veiling reflection, color, and brightness balance--are outlined. Planners are admonished to recognize the needs of visually handicapped students when planning school lighting. Following this is an explanation of the characteristics and uses of the three categories of lamps used in school lighting: incandescent; fluorescent; and high intensity discharge with its mercury, metal halide, and high and low pressure sodium types. The author then deals with windows and daylight, how to control sunlight, and designing for new schools. The relation between light and health and lighting for plant growth are briefly discussed. In closing, practices are listed to make the most of existing systems. (MLF)