Your class AAA solar simulator for your research.

Class AAA, LED Solar Simulator

LumiSun™ 50 is an innovative, compact bench top LED solar simulator that meets ASTM E927, IEC 60904-9, and JIS C 8904-9 Class AAA for spectral match, uniformity of irradiance, and temporal stability requirements.

LumiSun™ 50 incorporates the same leading LED array and optics architecture as our OEM solar simulators used by leading PV manufacturers world-wide, to do PV cell testing and research, photochemistry and biology, as well as materials testing.

System highlights:

Compact Benchtop LED Solar Simulator

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Outperforming bulky lamp-based systems

LumiSun™ 50 provides AAA illumination over a 50 x 50 mm area, making it ideal for use in research labs to measure the efficiency and spectral response of photovoltaic cells, as well as a range of other applications such as photobiology, solar degradation, and other sunlight reproach studies.

Unlike bulky lamp-based solar simulators, LumiSun™ 50 employs a multi-wavelength array of long lifetime LEDs that are driven independently. The design incorporates Innovations in Optics, Inc.’s patented light collection optics to project light extremely uniformly across the whole field of illumination – a major improvement over existing LED based designs on the market.

Remote digital control is enabled by an RS-485 interface with Modbus RTU communication protocol.

LumiSun™ 50 Irradiance Spectrum at 1.0 Suns

Wavelength range
Measured Irradiance
Share of Total
400 – 500
500 – 600
600 – 700
700 – 800
800 – 900
900 – 1100

Control Options

LumiSun™ 50 output power can be varied from 0.1 to 1.5 Suns. The LEDs can be set to closely emulate the spectral output of the sun. The unit offers three preset solar reference spectra, and the flexibility to create user-defined spectra by varying the output of the individual LEDs.

System Properties and Specifications

The LED light source of the LumiSun™ 50 is contained within an air-cooled housing that can rotate the angle of the illumination plane. The optimal working distance is adjusted by converging a pair of red dots from integrated laser pointers.

Solar simulator class
    AAA rated according to IEC 60904-9 Ed. 2, ASTM E927-19, JIS C 8904-9
Solar simulator type
  • Steady state and pulsed
  • External trigger, 100 µs minimum pulse width
Irradiance range of solar simulator class
  • 0.1 to 1.5 Sun
  • 400 – 1100 nm
Illumination area
    50 x 50 mm at working distance (W.D.)
Working distance (W.D.)
    151 mm (light source exit aperture to test plane)
Maximum angle subtended at W.D.
    29° (source aperture rim ti corner of test plane)
Warm up time for stable irradiance
    5 minutes (from a cold start)
Long term instability (LTI) of irradiance
  • ≤ 0.3%
  • 60 hours after 5-minute warm-up
Operating environment
  • 20°C to 40°C
  • < 85% relative humidity, non-condensing
Thermal sensors
    Safety shutdown for LED and driver PCBs
Communication protocol
    MODBUS TRU via RS-485
Power input
  • 24 VDC
  • <100 W power consumption
    0.5 kg (without rack and pinion mounting hardware)
  • Height (H): 207 mm
  • Width (W): 159 mm
  • Depth (D): 95 mm

Get started with the LumiSun™ today!