Most commercial spaces are over-lit, leading to wasted energy usage. But over-lit spaces can also affect the productivity of employees. Too much daylight or electric light can make even the most fundamental tasks, such as computer work, uncomfortable and difficult to perform. By incorporating lighting based on task performance and providing personal control of lighting and shading, commercial spaces can have measurable effects on employee productivity and motivation. In addition, employees typically dim the lights when given personal control, further increasing energy savings.