Interior Lighting for Designers

When mounted in close proximity to the surface being lighted, concentrated upward beams create isolated areas of high lumi- nanc ...

Figure 3.7An example of concentrated upward distribution. Figure 3.8An example of concentrated upward distribution with the ligh ...

BRIGHTNESS Figure 3.9Diffuse upward (indirect) distribution. Figure 3.10An example of diffuse upward distribution. Figure 3.11Mu ...

They provide efficient use of light on work surfaces while relieving contrast by reflecting light from the ceiling plane (figure ...

Vertical Surface Illumination Wall lighting is sometimes a substitute for indirect ceiling lighting: it lightens shadow and redu ...

Figures 3.19 and 3.20If all of the room surfaces are light-colored, interreflections will fill in shadows and reduce contrast. F ...

sisting of highlights and shadows. A change in this pattern, caused by a change in the direction and distribution of light, alte ...

truly flat: minor surface imperfections such as trowel marks, tape, and nail-head depressions are magnified by the shadows that ...

trast in corridors, washrooms, lunchrooms, lounges, and other meeting places. On most worksurfaces, however, diffuse light distr ...

of automobile headlights at night demon- strates that glare for the approaching driver is a function of direction as well as int ...

BRIGHTNESS Figure 3.30Unshielded lamp luminance for equiv- alent light output. Figure 3.31Limiting the amount of light emitted t ...

The second is to increase the area from which light is emitted (figure 3.32). A white glass globe and diffusing panels of white ...

Visual Comfort Probability (VCP) Avisual comfort probability (VCP)rating is defined as the percentage of people who, if seated i ...

worker must also perform, and (2) lighting of the area in the worker’s field of view. Sometimes the ambient room illumi- nance i ...

excessive contrast is created in a different way. Even when uniform ceiling luminance is achieved, the diffuse reflected light m ...

highlights via the dispersion of “white” light into the rainbow of colors that comprise it (see color plate 8). The presence of ...

Color Color is not a physical property of the things we see—it is the consequence of light waves bouncing off or passing through ...

surface appear red, because only red wave- lengths of light are reflected toward the eye. All other wavelengths are absorbed. If ...

tems of color notation and color rendition have been developed. Color Temperature Color temperaturedescribes how a lamp appears ...

CRIs of different lamps are valid only if they have similar correlated color temperatures. Therefore, it is inappropriate to com ...