Roof overhangs reduce and control glare. Light shelves at south shade windows and bounce light into interior areas. Tall windows allow light to enter interior areas. Shaped skylight wells diffuse and place light from the sun where it is needed. Electric lighting Effective match made between luminaire type and lighting purpose.
Occupancy sensors dim unused areas.
User-controlled task lighting puts light where it is needed when it is needed there. Indirect low-level ambient lighting is balanced with task lighting. Balance between interior and exterior light Photosensitive controls adjust interior lighting in response to external light conditions. Zoned controls allow electric lighting to be switched in direct response to daylight conditions in different parts of the building. Electronic ballasts and dimmers provide smooth adjustments in lighting.