(c) Eliminate lighting fixtures from established general lighting
layouts designated as non-task areas such as aisle space or other
traffic locations in front of doorways. Eliminate the fixture for rooms
over 9 sq. m (100 sq. ft.) if a door swing arc intercepts a lighting
fixture on the floor plans.
(d) Instead of using the ceiling system, run continuous rows of
three-lamp fluorescent fixtures centered over the front edge of
wall-mounted benches and crosswise to double-sided benches in
laboratories, pharmacies, shops and similar areas having work tables
and benches. Eliminate or reduce the number of fixtures over open floor
areas.
(e) Provide fluorescent over mirror lights in all toilets by using two
32 W (watt) lamps. The fixture length does not need to be confined to
the width of the mirror. Size the fixture to double as general
illumination in the case of small toilets. If a bathtub or shower is
included, install a ceiling light.
(f) In storage, shelf or stack areas, mount fixtures in rows lengthwise
over aisles between rows of shelves to make the most efficient use of
the lighting. In areas over 37 sq. m (400 sq. ft.), consider running
continuous fixture rows at 45 degrees to the general room dimensions,
coordinating the layout with the ceiling system design.
(g) Special lighting treatment of decorative areas such as Lobbies,
Waiting Rooms, Patios, Auditoriums, Chapels, etc., shall be limited to
efficient light sources that can only be used on special occasions or
double as general illumination. Decorative lighting of exterior areas
is permitted only where it is incidental to a functional lighting
system. Consider the use of compact fluorescent or HID lamps.
(h) In public corridors, lobbies or entrances to the building, energy
levels should not exceed 1 watt/sq ft.
6.10 CONTROL
(a) For fixtures with three, four or more lamps, switch the lamps
symmetrically for two (or three) lighting levels.
(b) In large window areas, switch fixture (or fixture rows) nearest to
the window separately.
(c) Where two or three-room entrances are not immediately adjacent to
each other, provide three or four-way switching of all room lights.
(d) Utilize low-voltage switching in large areas with multiple
entrances to allow extinguishing of all lights from any room exit.
(e) Utilize low-voltage switching in large areas to control
illumination separately at logical work station locations, such as
General Laboratories, Pharmacy areas, Shops, etc.
(f) Install occupant sensor (ultrasonic/infrared) controls for room
lights in Public Toilets, Conference Rooms, Day Rooms, Examination
Rooms (over 400 W (watts) of lighting) and similar spaces. Include a
ELECTRICAL DESIGN MANUAL
6-4
LIGHTING
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