Light is a fundamental aspect of people's environment and has various impacts on perception, well-being, and productivity. Several qualitative review articles provide an overview over how illumination affects visual and biologic processes, health, and productivity (Boyce, 2004; Juslén & Tenner, 2005). However, up to date, only one meta-analysis has quantified the influences of lighting (Gifford, Hine, & Veitch, 1997). In the last 15 years, a lot of research has investigated the effects of indoor lighting on both productivity and affective variables like mood and activation. Hence, in this paper, our objective was to quantify the effects of different lighting conditions on task performance and affect. Specifically, we wanted to take a closer look at the two most prominent parameters of lighting: level of illuminance and correlated color temperature. Based on previous research and theorizing, we expected that higher levels of illumination would lead a better performance. Second, due to melatonin suppression under cool, bright lighting conditions, high color temperature and high levels of illuminance should increase activation. Third, we expected that low levels of illuminance and warm light (low color temperature) would trigger positive affect because this lighting should create a warm and psychologically safe atmosphere.In a systematic research in the available psychology, ergonomics, and lighting literature, a total of 1699 references were collected. Studies were included when they investigated artificial light (1), manipulated or measured either illuminance or color temperature objectively (2), and reported at least one measure of performance or one measure of affect (3). Sixty-one articles met the selection criteria, providing 231 effect sizes for analyses. Preliminary analyses indicated a small positive effect of level of illuminance on task performance. Performance at low illuminance level (below 300 Lux) was worse than performance at medium illuminance levels (300 to 700 Lux; k = 19, d = .26) and performance at high illuminance levels (above 700 Lux, k = 26, d = .29). Moreover, performance was better at high compared to medium illuminance levels (k = 11 studies; d = .39). In the next steps, we will test whether the effects of how level of illuminance and color temperature on performance vary as a function of task type. Based on research on biological effects of lighting, it could be expected the high levels of illuminance and cool color temperature should be most beneficial for cognitive tasks requiring a focused attention. Moreover, in our analyses we aim at identifying other variables that moderate the lighting effects such as proportion of indirect lighting and potential interaction effects between level of illuminance and color temperature. In sum, this quantitative review should provide a strong aid in advancing theory and practice.