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LIGHT FANTASTIC" II MILITARY
FIELD LIGHT UNIT SPECIFICATIONS
GENERAL
The Light Fantastic II shall be mounted
on a post
or unit and shall operate from standard 120 or 240
VAC,
50/60
Hz
power
supply.
It shall
have
a
curved glass reflector which shall incorporate pat-
tern
color
correction
and
heat
reduction.
The
source of light rays shall be from a single, tubular
bulb positioned
in the middle
of the reflector and
shielded from view in front. The reflected beam
shall be concentrated
into a horizontal pattern
in
range from
18"
(45.7 cm)
to 36"
(91.4 cm).
The UL listed lighting unit shall provide a beam
of
light of shadow-reducing,
color- corrected,
heat-
reduced
quality, which will illuminate the oral cav-
ity in a manner
suitable
for dental
surgery.
The
pattern shall have a vertical height of 3"
(7.6 cm)
and a width of 8" (20.3 cm) with a range from 18"
(45.7 cm)
to 36"
(91.4 cm)
with optimum pattern
at 27"
(68.6 cm). The intensity shall be controlled
with
a three-position
dimmer
switch.
With
a line
voltage
of
120
or
240
VAC,
the
dimmer
switch
shall adjust the intensity from a minimum
of 1500
footcandles
at 27"
(68.6
cm)
to a maximum
of
2500
footcandles
at 27"
(68.6
cm).
The
corre-
lated color temperature shall be between
3800° K
(Kelvin) and 43009 K.
CONSTRUCTION
Light Head- Shall be a die cast aluminum frame
finished with baked-on expoxy powder and shall
consist of glass reflector, lamp focus bracket as-
sembly and handles.
Light Source - Shall be a tubular, bromine-cycle,
quartz-halogen
lamp
rated at 150 watts,
25 volts
(used at 23 volts). The rated life at the operating
voltage shall be 8,000 hours. Due to self-cleaning
properties,
bulb
shall
maintain
its
lumen
output
throughout
its
life.
Lampholders -Shall be General Electric® number
AL1-8817-402
ceramic
sockets.
They
shall
be
specifically designed
for use with quartz halogen
lamps.
Reflector — Shall be borasilicate glass with shape
designed to make efficient use of the cylindrically—
shaped filament and shall have a continuous vary-
ing contour which,
in effect, shall be equal to an
infinite number of flutes. The reflector shall reflect
the image of the entire filament from no less than
200° of the reflector vertical curvature. The reflec-
tor
shall
allow
infrared
(heat)
energy
to
pass
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2.11
coating shall diffuse light emitting from the back of
the reflector.
Nameplate
— Shall
be
pressure-sensitive
alumi-
num and shall bear company name, voltages, cur-
rent, serial number,
model number and other ap-
plicable data.
Front Arm- Shall enclose the mechanical spring
which counterbalances the weight of light head and
permits drift-free movement. Shall permit approxi-
mately 24" (61 cm) vertical travel of head and ex-
tend light head approximately 24" (61 cm).
Electrical Connections
— A UL listed three-wire
ground line cord and a 120 VAC green dot hospital
grade
male
plug
or a plug
suitable
for use
in a
hospital environment
shall be furnished. A 12' ex-
tension cord and instructions for 240 VAC conver-
sion shall also be provided.
Transformer
— Step-down
transformer
shall pro-
vide
proper
voltages
to operate
quartz
halogen
type lamp
and
shall be constructed
for long life.
Transformer shall isolate entire system from nor-
mal line. The transformer shall be enclosed in the
base of the rear arm.
Yoke - Shall contain switch and concealed wiring
to lamp
and
shall
be
capable
of 240°
horizontal
movement.
Vertical
rotation
shall
be
approxi-
mately
110° above
horizontal to 170°
below hori-
zontal in the other direction.
Rear Arm — Movement
at base shall be full 3600
rotation. Arm shall be 19"
(48.3 cm)
in length and
enclose wire from light to transformer.
Intensity Switch
— Three-position
switch
shall be
controlled by knob and shall select desired tap of
transformer
to
supply
adjustable
voltage,
thus
varying light intensity.
A Siemens Company
YL8-097805
Rev. 4, 11/94
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