Interior Lighting for Designers

ter. Flynn found that differences in quantity
of horizontal illuminance significantly alter
impressions of spaciousness and perceptual
clarity. Higher illuminance values are
described as “clear,” “bright,” “distinct,”
“large,” and “more spacious”^2 (figure 2.15).

Impressions of perceptual clarity

Nothing is more important than how peo-

ple’s faces appear. Flynn demonstrated that

lighting schemes rated high in facial clarity

are considered more public; schemes that

are rated low in facial clarity are considered

more private.

Public spaceimplies intermingling and

bringing people together. The potential for

visual contact improves as the intensity of

INTERIOR LIGHTING FOR DESIGNERS

Figure 2.15Impressions of spaciousness (large-small).

(^2) Improvement in visual contact continues to approxi-
mately 25 footcandles (fc) of ambient horizontal
illuminance, beyond which it stabilizes.