tainty is felt in an organized environment, less
attention is paid to it.
Lighting designers are ceiling designers.
Lighting layout drawings include locations of
luminaires, sprinkler heads, air diffusers,
return grilles, smoke detectors, loudspeak-
ers, and so forth. To prevent visual clutter,
these ceiling elements are organized in an
invisible grid (figure 13.4).
Whether providing uniform or nonuniform
lighting, organize luminaires in a pattern
based upon an invisible grid that is related to
the architecture. For example, figure 13.5
shows a 78-ft-long room and luminaires with
a maximum spacing of 10 ft. The solution
presented is eight equal spaces measured to
the center line of each luminaire. A half-
space at either end ensures adequate
illuminance near the walls. In the other direc-
tion, which is 36 ft, four equal spaces to the
center line of each luminaire are shown.
INTERIOR LIGHTING FOR DESIGNERS
Figure 13.4Invisible grid for luminaire placement.Figure 13.51 ft × 4 ft luminaire
pattern.