MEASURE
any light source

Light Measurement Spheres
Designed to measure total and forward fluxof LEDs, lamps and other light sources

Accurate and Flexible
The LMS Light Measurement Spheres areintegrating spheres are designed for themeasurement of the total flux of lamps.
The total flux of an unknown lamp is not measured
directly; instead this measurement is based oncomparison to a NMI traceable standard lamp. Labsphere’s Light Measurement Spheres range in size
from 25 to 300 cm in diameter. Six different spherediameters accommodate lamp sizes from LEDs to202 cm linear lamps. The sphere interior
is coated with Spectraflect®, a diffuse whitereflectance coating specifically formulated for lightmeasurement spheres.
Labsphere offers an 80% reflectance coating
for spheres used in photopically filteredapplications. The integrating sphere design
conforms to recommendations of industry
standards, providing an easy-to-operate, highly
accurate measurement component.

Advancing the Technology of Light: Measure. Create. Reflect.

Easy to Use
An electrical feed-through to connect the lamp toa power supply terminates at the lamp socket
mounting plate in the sphere. The design of thesphere makes sources considered difficult tomeasure easier to do so with accessible ports
and framing. The LMS spheres are equippedwith a diffuser based near cosine receiver.
This reduces errors associated with baffle
shadow and improves spatial collection, uniformity
and accuracy. The in-port Cosine receiver offers
angle wide field-of view, necessary for accurate
total flux measurements. The spheres provide
measurement data that depends only on thelight source’s true power and not the shape,size, spectral or spatial light distribution.
All light measurement spheres are compatible
with Labsphere’s spectrometers and flicker
test instruments.

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www.labsphere.com© 2019 Labsphere, Inc. All Rights Reserved
PB-14022-000 Rev 01

Spectraflect Reflectance CoatingValue• Light tight closure• Base-up or Base-down lamp mounting• Socket mounting plate• Adjustable fluorescent lamp holder• Variable height electrical supply tube
• Interchangeable baffle• Temperature sensor mounting port
• 2π port
• Absorption correction lamp port
• Absorption correction lamp baffleSpecifications 			Model Number:
Order Number:
Sphere Size:
Sphere Coating:
Maximum Lamp Length:
Maximum Lamp Wattage:
Minimum Lamp Luminous Flux*:
Sphere Assembly Frame:
Max Height:(cm)Required Foot Print:
Closed (cm)Open (cm)LMS-025
AA-30000-025
25 cm
Spectraflect
13 cm
100 W
0.003 lumens
Bench-top
39.05

LMS-050
AA-30000-050
50 cm
Spectraflect
25 cm
400 W
0.012 lumens
Bench-top
76.2

LMS-100
AA-30000-100
100 cmSpectraflect
61 cm
1500 W
0.04 lumens
On casters
179.07

LMS-165
AA-30000-165
165 cmSpectraflect
86 cm
4000 W
0.13 lumens
On casters
204.47

LMS-195
AA-30000-195
195 cmSpectraflect
132 cm
5000 W0.18 lumens
On casters
229.87

LMS-300 4π
AA-30000-300
300 cmSpectraflect
285 cm
10000 W
0.41 lumens
On casters
342.9045.9 x 30.2
x 39.164.2 x 46.8
x 39.1
4 kg
Clam Shell
Spun Aluminum
Extruded AluminumSpectraflect> 97% (nominal)

74.1 x 50.4
x 74
103.7 x 89.9
x 74
20 kg
Clam Shell
Spun Aluminum
Extruded AluminumSpectraflect> 97% (nominal)

128 x 98.1
x 166.7
174.4 x 165.9
x 166.7
92 kg
Clam Shell
Spun Aluminum
Extruded AluminumSpectraflect> 97% (nominal)

185 x 165
x 200
269.3 x 271.8x 200
300 kgClam Shell
Spun Aluminum
Extruded AluminumSpectraflect> 97% (nominal)

213.2 x 187
x 226
310 x 307.4
x 226
347 kgClam Shell
Spun Aluminum
Extruded AluminumSpectraflect> 97% (nominal)

431.8 x 571.5

462 kgClam Shell
Fiberglass
Extruded AluminumSpectraflect> 97% (nominal)

6
1.25 cm
22.5 cm<7 cm dia,
33 cm long6
1.25 cm
22.5 cm<14 cm dia,
67 cm long6
1.25 cm
22.5 cm<23 cm dia,
110 cm long

61.25 cm
22.5 cm<27 cm dia,
130 cm long6
1.25 cm		
22.5 cm<50 cm dia,
202 cm long

50 cm2200 cm2

545 cm2

760 cm2

5600 cm2

100°C
15 cm dia.;
71 cm215 - 2.5 cm
15 cm - 2.5 cm
33 cm

100°C
33 cm dia.;
337 cm2
33 cm - 15 cm;
15 cm - 2.5 cm
66 cm

100°C
53 cm dia.;
879 cm2
53 cm - 15 cm;
15 cm - 2.5 cm
110 cm

100°C
63 cm dia.;
1246 cm2
63 cm - 15 cm;

100°C		Optional

Weight:Sphere Open Style:
Sphere Assembly:
Frame Style:
Sphere Coating:Spectraflect Coating
Reflectance:
Total Number of Ports:
6Detector Port Dimension:
1.25 cm
Detector Port Quantity:
1
Temperature Probe Port:
2.5 cmMax Recommended
2.5 cmLamp Size: (LM-79) 		
4π geometry
Max Recommended
13 cm2
Internal Surface Size:(2% Rule)(cm2)
Max. Sphere Coating Temp:
100°C
Max Port or DUT Area: (2π)
5.08 cm dia.;
20 cm2
Port Frame Reducer:n/a		
Max Recommended
15 cm
Linear DUT Dimension:(2/3 sphere diameter)

431.8 x 571.5

N/A

130 cm* Based on Cool White LED and 2600 Spectrometer

Advancing the Technology of Light: Measure. Create. Reflect.

sales@labsphere.com

www.labsphere.com© 2019 Labsphere, Inc. All Rights Reserved
PB-14022-000 Rev 01

LMS-025 Light Measurement SphereLabsphere’s LMS-025 Light Measurement Sphere has a 25 cm diameterfor the measure of miniature and subminiature lamps with maximum lamp
wattage up to 100 watts and high brightness LEDs. The sphere is designed
to accommodate rail mounted heat sinked LEDs measurements as well asother forward flux measurements without having to open the sphere.

LMS-050 Light Measurement SphereLabsphere’s LMS-050 Light Measurement Sphere has a 50 cm diameter
integrating sphere mounted on a hinged frame designed for bench-top use.
The hinged configuration allows the sphere to be easily opened and closed
to change lamps or perform a measurement. The sphere is designed formeasurement of miniature and small lamps with a maximum lamp wattage up
to 400 watts.

LMS-100 Light Measurement SphereLabsphere’s LMS-100 Light Measurement Sphere has a 100 cm diameterand is mounted on a hinged frame equipped with rugged locking casters
to allow the sphere to be rolled and locked into position. The hinged
configuration allows the sphere to be easily opened and closed to change
lamps or perform a measurement. The sphere contains a lamp mounting
bracket designed to accept a variety of sockets for single contact and double
contact lamps and accommodates small and medium lamps with amaximum length of 61 cm and a maximum lamp wattage up to 1500 watts.

LMS-165 Light Measurement SphereLabsphere’s LMS-165 Light Measurement Sphere has a 165 cm diameter
integrating sphere mounted on rails to allow the non-stationed hemisphereto be rolled open for interior access. The dual, rail-mounted configuration of
the two hemispheres allows the sphere to be opened and closed easily tochange lamps or perform a measurement. The sphere contains a lamp
mounting bracket designed to accept a variety of sockets for single contact
and double contact lamps and accepts medium to large lamps with a maximum length of 122 cm, and a maximum lamp wattage up to 4000 watts.
LMS-195 Light Measurement SphereLabsphere’s LMS-195 Light Measurement Sphere has a 195 cm diameter
integrating sphere mounted on rails to allow the non-stationed hemisphereto be rolled open for interior access. Each hemisphere is mounted to a
separate carriage, allowing the sphere to be easily opened and closed tochange lamps or perform a measurement. The sphere contains a lamp
mounting bracket designed to accept a variety of sockets for single contact
and double contact lamps and accepts medium to large lamps with amaximum length of 132 cm and a maximum lamp wattage up to 5000 watts.

Advancing the Technology of Light: Measure. Create. Reflect.

sales@labsphere.com

www.labsphere.com© 2019 Labsphere, Inc. All Rights Reserved
PB-14022-000 Rev 01

3 Meter Light Measurement Spheres
Base Up, Base Down, Longitudinally
Easily and efficiently accommodates virtually any lamp type,including linear lamps up to 2.5 meters; indoor, outdoor androadway lighting.
Efficient and Reliable
With lighting technology advancing to include larger more
complex devices, Labsphere has introduced the LMS-3M
three meter integrating sphere for complete optical characterization of large lamps and luminaires. The sphere design complies
with IESNA LM-79 and LM-78 and many other recommended
guidelines and standards to deliver accurate, reproducible andcompliant measurements.
Value• Reinforced structure for base up/base down mountingof DUT• External jack for easy switch from base up to base down

mounting of DUT• Great for testing indoor and outdoor lighting• Baffled ambient temperature control intake and output ports• Design meets IESNA LM79 and LM-78 requirements for
4π measurements• Stress-free pneumatic open and close• Compatible with Labsphere light measurement systems,software, and accessories• Two cosine receiver ports allow for mounting of morethan one detector for simultaneous broadband andspectral measurements
Measures Large and Complex Devices
Complete optical characterization of large lamps and luminairesin 4π geometry.
Accurate, Reproducible Results
Complies with IESNA LM-79 and LM-78 standards. Enabling
photometric and colorimetric data for Total Spectral Flux,
Luminous Flux, Correlated Color Temperature (CCT),
Color Rendering Index (CRI), and Chromaticity.
Available as illumiaPlus® System
Works with all spectrometers and components of Labsphere’s
modular light measurement systems.

Advancing the Technology of Light: Measure. Create. Reflect.

The three meter lamp measurement integrating sphereaccommodates light sources positioned base up, base down
or longitudinally to easily and efficiently measure virtually anylamp or luminaire type. The design also allows for directionaland non-directional flux and color measurement of light sources.
The large sphere better integrates light enabling more reliable
testing of a device’s photometric and colorimetric performancewith measurements of Total Spectral Flux, Luminous Flux,
Correlated Color Temperature (CCT), Color Rendering Index (CRI),
Chromaticity, and more.
The near Lambertian properties of the sphere’s interiorcoating, Spectraflect, provides a uniform dispersion of lightthat integrates and reduces hot spots better than any othersphere coating available. Spectraflect® exhibits reflectancevalues of >98% and is spectrally flat throughout the visible
spectrum, therefore providing higher optical efficiency forlow lumen lamps.
The LMS-300 is designed to measure a variety of lamps andluminaire types on the same system with little adjustment.
The standard sphere geometry accommodates 4π measurement
and can easily be configured for 2π measurement with optional
apertures. Baffled intake and output ports and an ambient air
temperature controller module are available to maintain andmonitor temperature inside the measurement environment
enabling elevated temperature testing. The larger sphere size fully
integrates with all Labsphere photometric and spectroradiometriccomponents and software, making it easy for current users
to upgrade to this new size sphere.

sales@labsphere.com

www.labsphere.com© 2019 Labsphere, Inc. All Rights Reserved
PB-14022-000 Rev 01