Figure 4-7. Examples of sidelighting applications.

Design: Interior and Exterior Lighting and Controls
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UFC 3-530-01

22 August 2006

Figure 4-7. Examples of sidelighting applications.

4-8.2

Considerations for quantity of glazing:

Sidelighting windows should be located as high as possible since effective

daylight penetration from windows is 1.5 times the height of the window15.

Use high continuous clerestories for the deepest daylight penetration and

uniformity.

In order to provide exterior views, provide glazing at eye level.

Use view windows that have minimal wall area between windows. Avoid

small windows located in large wall areas because of the uncomfortable

contrast and glare that result16.

0.09 m2 (1 sq ft) of top lighting can provide illumination to about 10 times

the area that Sidelighting provides yet does not provide the view17.

Space top lighting apertures approximately one and a half times the ceiling

height for even illumination. Recess and splay (45 to 60) skylights to

minimize glare18.

Toplighting systems located at least 1.5 times the mounting height on

center can provide even daylight distribution.19

US Department of Energy, Energy Efficiency and Renewable Energy, "Sidelighting vs. Toplighting",

National Best Practices Manual, Daylighting and Windows, p. 73.

New Buildings Institute, Inc. "Luminaires and Light Distribution, Daylight Systems", Advanced Lighting

Guidelines, Chapter 7. 2001 Edition, p. 7-35.

US Department of Energy, Energy Efficiency and Renewable Energy, "Toplighting", National Best

Practices Manual, Daylighting and Windows, p. 75.

US Department of Energy, Energy Efficiency and Renewable Energy, "Design Details", National Best

Practices Manual, Daylighting and Windows, p. 101.

The Heschong Mahone Group, "Designing with Skylights", Skylighting Guidelines, Chapter 2, 1998, pp.

2-5.

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