Interior Lighting for Designers

PERCEPTION Figure 1.8Necker cube. When you stare at the dot, the cube flips as the brain entertains two different depth hypothes ...

ofbrightness. Illuminance, which is the den- sity of light received on a surface, is mea- sured by various kinds of photometers, ...

Color Perception Brightness is also a function of color. For a given intensity, the colors at the middle of the spectrum look br ...

What we perceive as white is not a par- ticular mixture of colors, but rather the gen- eral illumination, whatever this is. A ca ...

Psychology Because the sense of sight is contrast sensitive, the brightness contrast of a space determines its emotional impact. ...

degrees of stimulation or arousal. The more stimuli that must be processed by a person, the higher the load. Environments that a ...

PSYCHOLOGY Figure 2.2Low-contrast lighting. Figure 2.1Patterns of light and shade establish brightness contrast. ...

High-Contrast Environment A small proportion of diffuse light and a large amount of focused light produce ahigh-con- trastenviro ...

Figure 2.4High-contrast lighting. Figure 2.5High-contrast lighting. ...

Ambient luminescence is shadowless illumination. It minimizes form and bulk. It dematerializes. It reduces the importance of thi ...

night... sunlight on a tumbling brook... the heaven full of stars ... birch trees interlaced by a motor car’s headlights. Play o ...

reflected light from the sand. Objects that are lighted by the sun, such as sandcastles, people, bright beach blankets, and bath ...

ter. Flynn found that differences in quantity PSYCHOLOGY Figure 2.10Peripheral wall lighting, all walls. Figure 2.11Overhead dif ...

ter. Flynn found that differences in quantity of horizontal illuminance significantly alter impressions of spaciousness and perc ...

Figure 2.17Impressions of perceptual clarity—private space. Figure 2.16Impressions of perceptual clarity—public space. ...

general illuminance is increased. Increasing intensities reduce anonymity and bring people together because facial expressions a ...

Vertical Surface Illumination When wall lighting is added, Flynn discov- ered that ratings shift to the positive for all three c ...

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Brightness Specifying the direction and distribution of light in a space yields the desired brightness contrast. Brightness vers ...

120°—offer a more practical light distribu- tion for many purposes. A luminaire with a 100° beam-spread, emitting most of its li ...