Interior Lighting for Designers

doorway and causing glare (downlight/half

wall-washer) (figure 12.20).

Downlight/wall-wash luminaires have

downlight distributions in three directions vir-

tually unchanged by the kicker reflector. They

work well in small rooms, such as a 10-ft-

wide office where opposite walls are lighted;

the downlight component provides good

modeling of faces throughout the room. The

lighted vertical surface is moderately lighted;

the horizontal and vertical planes appear to

have relatively equal emphasis.

Reflector wall-washers.A greater empha-

sis on the vertical surface is provided by

luminaires that light only the walls without

any significant downward distribution.Reflec-

tor wall-washersmake use of sophisticated

optical systems to provide distribution and

luminance control. There are two kinds of

reflector wall-washers: lensed wall-washers

and open-reflector wall-washers.

Lensed wall-washerscontain a lamp,

preferably a directional source; an internal

kicker reflector; a spread lens; and a bright-

ness-controlling reflector to shield glare (fig-

ures 12.21 through 12.24). Lensed wall-

washers are available for tungsten-halogen

MR and PAR, compact fluorescent, metal

halide, and HPS lamps.

Reflectors that are not circular, para-

bolic, elliptical, or hyperbolic are called non-

focal reflectors.Open-reflector wall-washers

have a compound-contour reflector shape

LUMINAIRES

Figure 12.20Typical room layout using matching-aperture, parabolic, open-reflector downlights and downlight/wall-
washer variations.