Basics of Daylighting in a Green Environment
The use of natural sunlight, known as daylighting, to illuminate a building can save energy, reduce operating costs, create visual appeal, and enhance occupant health and productivity. The U.S. Green Building Council Leadership in Energy and Environmental Design (LEED™) rating system encourages the use of daylighting to achieve high performance buildings. This course provides an introduction to the use of daylighting in commercial spaces. The course objective is to show why daylighting should be considered, the basic guidelines of using daylighting and some words of caution when using certain daylighting techniques.

5.1 By Time Of Day

In daylit areas, energy consumption can be reduced by reducing the electric lighting in response to the availability of sufficient daylight. This can be done through dimming or switching. The diagram below shows the illumination level during the course of a typical day for a daylighting application. Throughout the day, the electric lights are dimmed to maintain a near constant interior light level.

Energy savings realized will depend on:

  • Activities within the building
  • Building form, orientation and design
  • Climate
  • Control design and installation

Property of

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