MIL-HDBK-1191
fixture lens. Fluorescent lamps of the U-Tube type should not be used. Use
of HID fixtures in patient care areas is not permitted. Refer to Section 7,
"ENERGY and WATER CONSCIOUS DESIGN," for energy conscious design
considerations.
BATTERY OPERATED LIGHTING. Fifteen to 25 percent of the general
10.5.2
lighting in the operating rooms, obstetrical delivery rooms, emergency
treatment rooms, cystoscopy, and cardiac catheterization rooms and any other
room with invasive procedures will be provided with 1 and 1/2 hour battery
backup for general illumination which will operate without interruption during
periods of normal and emergency power lapse. All permanently installed
surgical task light fixtures will be provided with no-break power to bridge
the power interruption between loss of normal power and the transfer to
emergency power. Batteries for lights in operating and delivery rooms will be
located outside those rooms. Fifteen percent of lighting in nurseries will be
provided with 1 and 1/2 hour battery backup. Battery capacity may be reduced
to 1/2 hour illumination if backed-up by two or more emergency generators. A
minimum of 1 battery powered light will be provided in the generator set and
emergency switchboard location and central communications room.
PATIENT BEDROOMS. In patient bedrooms, one wall mounted
10.5.3
direct/indirect lighting fixture or a medical wall module system, with
lighting features as described herein, will be provided at each bed. Each
unit will include upward directed fluorescent lamps for general illumination
and downward fluorescent lamps for patient use. The upper fluorescent lamps
will be controlled at the door and at the wall unit with a three-way switch.
The lower fluorescent lamps for each patient's use will be switched at the
bed. All switches will be of the quiet-operating type. Use of low voltage
switching utilizing the nurse call handset will be considered. Night lights
mounted in the patient service console will be provided at each bed and will
be photo cell controlled and manually controlled at the corridor door.
OTHER ROOMS. Fixtures in nurseries, surgery, obstetrical suites,
10.5.4
emergency treatment rooms, examination rooms, and laboratories will be
recessed fluorescent type. Nurse station lights will be switch controlled to
achieve 33, 66, and 100 percent illumination levels. Corridor lights
adjacent to intensive care bedrooms and nursing unit will be one-third
increment switch controlled. In recovery rooms, coronary and intensive care
units and X-ray therapy rooms, where patients may be in a supine position for
extended periods, low-brightness diffused lighting will be provided. For
examination purposes in intensive care units, isolation rooms, single patient
bedrooms, labor rooms and recovery, a four-lamp fluorescent lighting fixture,
operated by a conveniently located switch, will be provided above each bed.
Fixtures in seclusion rooms will be of the recessed incandescent type, of
tamperproof construction with impact-resisting tempered lenses. Seclusion
rooms will be provided with tamper resistant incandescent night lights.
Darkrooms will be provided with an incandescent photographic safelight in
addition to the normal white light for general room illumination. The
safelight is normally considered an item of medical equipment. The "darkroom
in use" light, located outside and above the darkroom door, will be controlled
by the switch which controls the safelight in the darkroom. The "darkroom in
use" light is not required at light-tight type doors. For darkrooms with film
loading bins, bin drawers will be interlocked with darkroom white light and
safelight so that when a bin drawer is opened, white light is extinguished
and safelight remains lit. X-ray rooms will be provided with indirect
lighting. The location of X-ray room lights must be coordinated with X-ray
equipment. Therapeutic X-ray rooms will be provided with an "X-ray In-Use"
light, located outside and above each door. The "X-ray In-Use" light will be
controlled by the X-ray
unit on-off line power controller. Conduit and
wiring from the "X-ray In Use" light to the X-ray unit control console will be
provided. Diagnostic X-ray rooms will not be provided with "In-Use" lights.
Electroencephalogram rooms will be provided with dimmed incandescent fixtures,
refer to Section 16 for more details.
10-20
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