be symmetrically arranged within all finished areas except open dental
operatories. In such operatories, fixtures will be concentrated above the
dental chairs. Lighting intensities at the working surface in each dental
operatory will be not less than 1076 Lux (100 footcandles) nor more than
1614.4 Lux (150 footcandles) with a minimum of 2 level switching circuits.
Where color matching is a critical function, such as in the prosthetics
laboratory and dental treatment rooms, color improved fluorescent lamps will
EXTERIOR SIGNAGE. Exterior signage for "EMERGENCY SERVICES" will
be stencil-faced with red transilluminated letters, and will be readily
visible, identifiable, and legible at all entrance drives. The contrast level
of illuminated signage shall be symmetrical and not deviate more than plus or
minus 5% percent. Signage for facilities having after-dark operations will
have transilluminated letters indicating the facility name. Illuminated signs
will be designed for rapid replacement(time not to exceed 15 minutes). Sign
location will be coordinated with illumination of access roads, parking areas,
and building entrances to minimize requirements for additional illumination of
PARKING AREAS AND WALKS. Normal site areas intended for night use
will be illuminated by an average of 5.38 Lux (0.5 footcandles) and 10.76 Lux
(1 footcandle) for handicap areas, measured on 1 foot intervals, of incident
light on the area served. Parking areas will be illuminated with high pressure
sodium fixtures equipped with lamps with dual restrike elements.
DIMMING. Eye lane and eye examination room and group therapy
observation room illumination will be furnished with recessed fluorescent
fixtures and dimmable incandescent fixtures. Switches and dimmers for eye
lane and eye examination room will be located close to the examination chair.
Maximum footcandle level in group therapy observation room with respect to
footcandle level in group therapy (mirror) room should not exceed
manufacturer's recommended ratio for one-way mirrors utilized. Fluorescent
general lighting in fluoroscopic and radiographic special procedures rooms
will be dimmed at the control stand or at the door entrance, as required.
UV filters shall be provided in infant
ULTRAVIOLET FILTERS (UV)
care areas to prevent retina damage to premature infants and other areas where
cataracts are of a major concern.
MAINTENANCE AREA LIGHTING. Interior utility tunnels and walk-in
pipe chases will be illuminated by one footcandle of incident light for the
safety of maintenance personnel. Switches for these lights will be equipped
with pilot lights and located in areas that are normally occupied.
Receptacles for temporary work lights will be located at reasonable intervals.
AUDITORIUM. The down light fixture over the podium will be
controlled from the podium and the entrance.
HELIPAD LIGHTING, MARKING AND CONTROLS. Where helipad lighting is
required for night operations in visual meteorological conditions (VMC), the
lighting will be designed to ANNEX A criteria Perimeter, limit, floodlights,
glide slope indicator, wind-indicator and rotating beacon aviation lighting
systems will be incorporated into the design. When marking the helipad for day
time operations retroreflective paint markings in Figure 10-2 will be used.
Lighting will be connected to the essential power supply. See Chapter 2 for
site requirements and ANNEX A for "HOSPITAL HELIPAD SYSTEM REQUIREMENTS." The
center perimeter light on each side and the wing-out light are red to
symbolize the nighttime international Red Cross symbol. The lighting controls
may be pilot and/or hospital radio controlled, or manual at helipad site.