The concept of open work and living spaces flooded with daylight has firmly established itself in our minds as a symbol of modernity and contemporary spirit. While the workplace has always been the subject of ergonomic studies and optimizations regarding good daylight provision, large-scale glazing has now also become standard in residential areas. But does this automatically guarantee better lighting? Based on this question, the publication "LichtEinfall" addresses central aspects of lighting design, such as the relationship between daylight provision and architectural design, building orientation, facade characteristics, floor plans, room proportions, spatial effects, and comfort. It discusses both general characteristics and fundamentals as well as subtle facets of an intelligent approach to daylight.