Daylighting and Electric Lighting in SchoolsLighting has always been an important component of educational facilities. In the first half of the 20th century, natural light was the dominant method for illuminating school rooms. Large windows were obviously a key design element. As electric light sources came into use, first incandescent and later, linear fluorescent, meant that school spaces could be adequately lit on inclement days, and classroom hours could be extended earlier, later and into the evening. The use of natural daylighting became less of a consideration. Given the ever present reality of energy costs and codes, design standards for educational facility design and energy and environmental management, school administrators and planners have developed a new understanding of the psychological and physiological benefits of combining natural and electric light in new and rehabbed school buildings. This is made possible due to recent advances in energy efficient lighting systems, energy efficient windows and skylights and automated control systems that bring the two lighting methods into sync with one another. A properly integrated daylighting system should include:
When planning for new construction or renovation, school administrators should consider the cost benefits and paybacks of daylighting systems versus the initial system costs.
The combination of daylight harvesting and control technologies, combined with low-e glazing and shading systems, results in reduced energy and maintenance costs.The long term ROI can offset the initial cost of the daylighting system while enhancing student comfort and performance. Total Cost of Lighting OwnershipThe Total Cost of Lighting Ownership (TCOO) of your school lighting system is derived from:
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