Lighting Functions

It is important to assess the function for which lighting is needed when considering options for efficiency improvements. Lighting functions include:

• Ambient lighting provides general illumination indoors for daily activities, and outdoors for safety and security.
• Task lighting facilitates particular tasks that require more light than is needed for general illumination, for example, desk lamps.
• Accent lighting draws attention to special features or enhances the aesthetic qualities of an indoor or outdoor environment, such as lights in lobbies and conference rooms.

Matching the amount and quality of lighting to the needed function is a key strategy to improving overall lighting environment and efficiency in any space. For example, using task lighting to reduce ambient lighting may not only reduce energy demand, but will also allow for greater flexibility and higher quality working conditions.

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