DATA SH EE T
GE
Lighting
ConstantColor™ Precise™ IR
Energy efficient low voltage dichroic
mirror halogen reflector lamps
Description
Precise™ MR16 lamps are low voltage tungsten halogen
reflector-mounted lamps popular for downlighting and accent
lighting applications because of their small size, precise beam
control, high efficacy, excellent white light and cool beam
characteristics.
New ConstantColor™ Precise™ IR lamp comprises a small
halogen low voltage filament infra-red coated capsule
permanently cemented into a one-piece, dichroic coated all
glass reflector.
Beam patterns range from very narrow spots to wide floods.
The lamp incorporates an integral clear lens to ensure that
both bulb and reflector are protected from dust and dirt during
installation and operation.
Cover glass effectively eliminates UV-C radiation and greatly
reduces UV-B radiation.
Technical Data
12Volts
Burning Position: any
Bulb: clear, closed, Cap:GU5.3
Standard
Watts
IR
Watts
Peak
intensity
(Cd)
Beam
spread
(°)
Colour
temp.
(K)
Rated
avrg.
life (h)
35
20
6000
10
2900
5000
35
20
2300
24
2900
5000
35
20
1000
36
2900
5000
50
30
10000
10
2950
5000
50
30
3350
24
2950
5000
50
30
1600
36
2950
5000
50
35
12000
10
2950
5000
50
35
4200
24
2950
5000
50
35
2000
36
2950
5000
• IR coated capsule
› Results in up to 43% energy saving
65-71
45
14000
10
3000
5000
65-71
45
5200
24
3000
5000
• Premium ConstantColor™ coating
– Advanced GE Thin Film Technology
› To maintain consistent colour over life
– Reliable hard dichroic coating (double sided)
› Close to 90% maintained light output over life
› Eliminates backlight
– Does not evaporate & maintains reflectance through life
65-71
45
2300
36
3000
5000
Features & benefits
Dimensions (mm)
• Precise optical control. Evenly lit surfaces
• Crisp, white light
• Long 5000 hour life
• UV control
• Provide instant–on, full light output at start-up
• Environmentally friendly with no lead or mercury
A
B
C
D
E
F
G
MIN.
–
6.1
–
1.45
49.4
–
35.8
AVE.
5.33
–
–
–
–
–
–
MAX.
–
7.62
50.5
1.60
50.7
4.5
38.4
Closed bulb
Halogen IR Technology
Halogen-IR coating
Standard incandescent and halogen lamps lose approximately
76% of the input energy by radiating heat, and convert only
8% into useful light. The Precise™ IR halogen capsule has
multiple layers of very durable, thin, interference film which
redirects heat, which would otherwise be wasted, back onto
the lamp filament. This increases the filament temperature and
allows it to give off more visible light for the same input power.
Infrared light
reflected back
to filament
More visible light
The increased burning efficiency provides the same light
performance with a significantly reduced power input,
alternatively allows a longer lamp operating life or a
combination of both.
ConstantColor™ Coating
The application of GE Thin Film Technology is designed to
maintain consistent colour throughout life. The durable Titania
and Silica coating materials can withstand temperatures of
500°C without degradation over a rated life of 5000 hours.
ConstantColor™ coating
– double-sided coating
Visible light with
constant hue
Backlight
With coating applied to both inside and outside of the
reflector, a wasted backlight is virtually eliminated. The
small amount of light that does escape through the
reflector is a consistent hue which will not vary from
lamp to lamp through life, ensuring replacements do
not appear different from existing lamps.
Light is not transmitted backwards
Lumen maintenance
Cool beam
Advanced coating technology ensures, a high level of lumen
maintenance is achieved throughout lamp life. Normal
dichroic coatings can lose over 30% of lumen maintenance
over life as the result of coating degradation.
The ConstantColor™ interference film still allows over 2/3 of
the infra-red heat to pass through the back of the reflector
to ensure a cool beam is achieved while reflecting forward
almost 100% of the visible light.
Spectral Irradiance MLP CC vs Al
UV
80
60
1.20E-04
40
1.00E-04
20
0
Heat [ = "IR"]
1.40E-04
Beam Power [mW]
Lumen maintenance (%)
100
0
1000
2000
3000
Hours
GE ConstantColor™
Precise™ IR MR16
4000
5000
Conventional MR16
Only ~ 22% of the IR emitted
from halogen capsule
is within beam from
ConstantColor™ dichroic
coated reflector
[in comparison to Aluminum-coated
reflector, between 750-2400 nm]
8.00E-05
6.00E-05
4.00E-05
2.00E-05
0.00E+00
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
Wavelength [nm]
Aluminum [avg]
ConstantColor™ dichroic
Precise optics
The computer designed multi-faceted reflector produces a “precise” beam pattern with excellent uniformity and sharp
beam cut-off. The reflector is ellipsoidal in shape. The filament is precisely aligned along the optical axis of the reflector
during the manufacturing process to achieve the required beam pattern.
3000
Light, life & voltage
For any particular lamp, the light output and life depend
upon the voltage at which a lamp is operated. For instance,
as approximations, the light output varies as the 3.6th
power of the voltage and the life varies inversely as the 12th
power of the voltage. The Chart and Tables below illustrate
the effects of overvoltage or undervoltage applied to lamp
on its current, life and light output. The values given (except
for long life lamps) are reasonably valid between 95% and
110% rated volts.
Beyond this range the indicated characteristics may not
be realised because of the increasing influence of factors
which cannot be incorporated into the chart. The chart
applies only to sine-wave A.C. current. The data may differ
particularly for lamp operation on half-wave rectified
voltage, semiconductor dimming devices of constant
operation or D.C. current.
UV control
The use of IR coating and an optically neutral front cover
glass allows the lamp to fully comply with the stringent
requirements of IEC 60432-3.
Bulb Wall
W+2X ➤ WX2
WX2
W
W: Tungsten
X: Halogen
WX2 ➤ W+2X
Voltage variations
100
90
5X
110
Life
150
Lumens
2X
125
Current
1X
100
100
1X
Life
Current
Lumens
75
90
100
5X
110
Percent of Design Voltage
Underrated Bulb Voltages (<100%)
VOLTS %
AMPS %
LUMENS %
LIFE %
99
99.5
96.5
111
98
99.0
93.2
122
97
98.4
89.9
136
96
97.9
86.7
150
95
97.4
83.5
167
90
94.8
69.1
287
Overrated Bulb Voltages (>100%)
VOLTS %
AMPS %
LUMENS %
LIFE %
101
100.5
103.6
90
102
101.0
107.2
82
103
101.5
110.9
74
104
102.0
114.8
68
105
102.5
118.7
61
110
105.0
139.7
39
Life (Times normal) / %Lumens / %Current
The tungsten filament is enclosed in a gas filled quartz
bulb, together with a controlled quantity of halogen. At
the operating temperature some tungsten vapourizes
and migrates to the cooler areas of the bulb wall where
before it can be deposited, it combines with the halogen to
form a tungsten halide. This circulates until it comes near
the filament where the halide dissociates and deposits
the tungsten back on the filament. This cycle continues
throughout the operating life of the lamp.
As the bulb wall remains clean the bulb size can be reduced
considerably by the use of quartz which can withstand the
high wall temperatures.
The small bulb and strong materials withstand much
higher working pressures and the increased gas density.
This reduces filament evaporation, thus offering increased
performance either as more light or longer life.
Tungsten halogen principle
%Lumens / %Current / Life (Times normal)
Tungsten halogen principle
Performance Cones
All GE reflector lamps have a performance cone. This is to help achieve the most effective spread and level of illumination by
showing the lamp power, beam spread and mounting distance of each lamp.
A performance cone is a visual indicator of the angle at which the intensity of a beam produced by a reflector is at 50% of
its peak. The cone shows the angle, the level of peak illuminance (lux) and the beam diameter for planes at right angles at
Lamp to surface angle
Q35 MR16
55 degree
LAMP
0 Degrees
LUX at
Circle
Point
Distance
4013
From lamp Diameter (Meters) Input Distance (MH)
1003
0.50 Meters
0.444
0.50
446
1.00 Meters
0.887
1.00
251
1.50 Meters
1.331
1.50
161
2.00 Meters
1.775
2.00
111
2.50 Meters
2.218
2.50
82
3.00 Meters
2.662
3.00
63
3.50 Meters
3.105
3.50
50
4.00 Meters
3.549
4.00
4.50 Meters
3.993
4.50
5.00 Meters
4.436
5.00
40
Diameter (Meters) 4.436
Lamp to surface angle
Q35 MR16
LAMP 24 degree
0 Degrees
Nominal beam angle degrees = 31.9
LUX at
Circle
Point
Distance
8288
From lamp Diameter (Meters) Input Distance (MH)
2072
0.50 Meters
0.286
0.50
921
1.00 Meters
0.571
1.00
518
1.50 Meters
0.857
1.50
332
2.00 Meters
1.143
2.00
230
2.50 Meters
1.428
2.50
169
3.00 Meters
1.714
3.00
130
3.50 Meters
1.999
3.50
102
4.00 Meters
2.285
4.00
4.50 Meters
2.571
4.50
5.00 Meters
2.856
5.00
83
Diameter (Meters)
Lamp to surface angle
2.856
Q20 MR16
24 degree
LAMP
0 Degrees
LUX at
Circle
Point
Distance
8392
From lamp Diameter (Meters) Input Distance (MH)
2098
0.50 Meters
0.170
0.50
932
1.00 Meters
0.340
1.00
525
1.50 Meters
0.511
1.50
336
2.00 Meters
0.681
2.00
233
2.50 Meters
0.851
2.50
171
3.00 Meters
1.021
3.00
131
3.50 Meters
1.191
3.50
104
4.00 Meters
1.362
4.00
4.50 Meters
1.532
4.50
5.00 Meters
1.702
5.00
84
Diameter (Meters)
1.7021
Photometric data
20W 10°
20W 24°
105°
120° 135° 165°165° 135° 120°
90°
105°
20W 36°
105°
90°
0
120° 135° 165°165° 135° 120°
90°
105°
105°
90°
0
120° 135° 165°165° 135° 120°
90°
105°
90°
0
100
250
1000
75°
75°
75°
75°
500
200
75°
750
60°
75°
300
2000
60°
3000
60°
400
60°
1000
60°
60°
500
600
1250
4000
700
1750
45°
45°
5000
45°
45°
800
45°
45°
2000
900
6000
30°
15°
2250
15°
30°
30°
30W 10°
15°
1000
15°
30°
30°
30W 24°
120° 135° 165°165° 135° 120°
105°
105°
90°
105°
120° 135° 165°165° 135° 120°
105°
0
90°
90°
90°
75°
75°
90°
75°
75°
60°
60°
75°
400
1000
3000
600
4000
60°
105°
200
500
2000
30°
0
1000
75°
15°
30W 36°
120° 135° 165°165° 135° 120°
105°
0
90°
15°
60°
5000
1500
60°
60°
800
2000
6000
1000
7000
2500
8000
45°
45°
10000
15°
1400
1600
3500
15°
30°
30°
35W 10°
15°
15°
30°
30°
35W 24°
105°
120° 135° 165°165° 135° 120°
90°
45°
45°
3000
9000
30°
1200
45°
45°
105°
90°
120° 135° 165°165° 135° 120°
105°
105°
0
90°
90°
120° 135° 165°165° 135° 120°
90°
75°
105°
90°
0
2000
75°
30°
200
500
75°
15°
35W 36°
105°
0
15°
75°
1000
400
75°
75°
600
4000
1500
800
60°
60°
6000
2000
60°
60°
60°
2500
8000
45°
1200
1400
3000
45°
10000
3500
45°
60°
1000
45°
1600
45°
45°
1800
4000
2000
12000
4500
30°
15°
15°
30°
30°
45W 10°
15°
15°
30°
30°
45W 24°
120° 135° 165°165° 135° 120°
105°
90°
105°
0
15°
30°
45W 36°
120° 135° 165°165° 135° 120°
105°
90°
15°
105°
120° 135° 165°165° 135° 120°
105°
0
90°
90°
90°
105°
90°
0
250
2000
75°
75°
1000
75°
75°
75°
75°
500
4000
750
2000
6000
60°
60°
60°
60°
1000
60°
60°
1250
3000
8000
1500
10000
45°
45°
4000
45°
45°
1750
45°
45°
2000
12000
5000
2250
14000
30°
15°
15°
30°
30°
15°
15°
30°
30°
15°
15°
30°
Operation and Maintenance
IEC Standards
• Low voltage tungsten halogen lamps are sensitive to
voltage variations. Even a small change in voltage can
have a considerable impact on lamp life and light (see
“Light, Life & Voltage”). Designers should match fitting
transformer ratings to actual mains line voltages to ensure
that the lamps operate at as close to 12V as possible.
• Rapid cycling can also shorten lamp life, and designers
should take advice from their GE Lighting representative
before using these lamps in flashing or blinking
applications.
• The lamps may be dimmed by reducing voltage. However,
this may cause the bulbs to blacken. If this occurs the
lamp should be run at full voltage (12V) for fifteen minutes,
thereby clearing the problem. Note that the nature of low
voltage lighting systems requires the use of fluorescenttype dimmers.
• Switch off mains supply before installing/removing lamp.
• Fuse is essential in circuit.
• Observe temperature tolerances: pinch seal, max. 350°C,
bulb wall min. 250°C.
• Lamps should be free from contamination, including finger
marks, before lamp is operated. Lamps can be cleaned
with a soft cloth moistened with alcohol.
• Good condition of the lampholder contacts is essential.
• Bulb wall temperatures are high and therefore lamps
should not be operated in flammable atmospheres unless
enclosed in suitably rated luminaires.
• Ensure lamp is cool before removing.
• Do not use if outer reflector is cracked/broken.
GE tungsten halogen lamps comply with the following
international standards where applicable:
• IEC 60432-3 Tungsten Halogen Lamps Safety Standard,
• IEC 60357 Tungsten Halogen Lamps Performance
Standard,
• IEC 60061 Lamp Caps & Holders - Part1: Lamp Caps
www.gelighting.com/eu
and General Electric are both registered trademarks
of the General Electric Company
GE Lighting is constantly developing and improving its products. For this reason, all product descriptions in this brochure are intended as a general
guide, and we may change specifications time to time in the interest of product development, without prior notification or public announcement. All
descriptions in this publication present only general particulars of the goods to which they refer and shall not form part of any contract. Data in this
guide has been obtained in controlled experimental conditions. However, GE Lighting cannot accept any liability arising from the reliance on such data
to the extent permitted by law.
ConstantColor™ Precise™ IR data sheet – English – February 2010