LumiSun 50
LED Benchtop Solar Simulator

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LumiSun 50

The LumiSun-50 offers A+A+A+ illumination across a 50x50mm area, making it perfect for research labs to measure the efficiency and spectral response of photovoltaic (PV) cells. It is also suitable for various other applications, including photobiology, solar degradation studies, and other sunlight research. Unlike bulky, costly, and environmentally harmful lamp-based systems, the LumiSun-50 utilizes a multi-wavelength array of long-lasting LEDs. These LEDs are independently driven and allow users to control and adjust the spectra.
The Highlight Features
- IEC class A+A+A+ compliant
- Compact size
- Irradiance 0.1 to 1.2 Suns
- Long LED lifetime >20,000 hours
- Spectral range 350-1250nm
- 35 l individually controlled
- 50 x 50mm highly uniform area
- RS485 & USB computer connection (Modbus RTU)
- Steady state or pulsed mode

Model | LumiSun-50 | |
---|---|---|
Solar simulator class | A+A+A+ | IEC 60904-9 Ed. 3 |
Irradiance range of solar simulator | 0.1 to 1.2 Suns2 | 350-1250 nm |
Illumination area | 50 mm x 50 mm | At working distance 124.2 mm |
Expected Lifetime | >20,000 hours | L70 |
Spectral Deviation | < 15%; <12%; < 9% | 300-1200nm; 350-1250nm; 400-1100nm |
Spectral Coverage | 100%; 98% | 350-1250nm; 300-1250nm |
Non-Uniformity | A+ < 1% | |
Instability (16 hours @ 1 Sun2) | A+ < 1% | |
Temporal Instability (STI) | < 0.1 % | 50Hz sampling over 3s; Exceeds A+ |
Long-term temporal instability (LTI) | A+ | < 1% 1,000 hours |
Spectral Match (IEC binning) | A+ | 300-1200nm per IEC spec |
Working distance (WD) | 124.2 mm | Source exit aperture to test plane |
Maximum angle subtended at (WD) | Half angle 12.3° | Full cone angle 24.6° |
Warm up time for stable irradiance | < 1s (system on) | From enable to within 1% final output (on state) |
Temperature Control of LEDs | Yes | With TEC module; set points at 25˚ and 40˚ |
Operating environment | 20°C to 40°C | <85%, relative humidity, non-condensing |
Thermal sensors | Safety shutdown | LED and driver PCBs. Controlled by software |
PC Communication | RS485 and USB | RS485 connector dual RJ45, USB (type B) |
RS485 Communication | Protocol MODBUS RTU | 19.2 kBd – 230.4 kBd |
USB Communication | Protocol MODBUS RTU | via COM port redirection |
Maximum on-pulse duration | < 200 µs | and CW |
Maximum trigger frequency | >10 kHz | |
Maximum rise time | < 100 µs | Time to stable output from trigger |
Maximum Time to Stable Output | < 10 ms | With changes to intensity set point |
System Width (including screw heads) | 17.88 cm | See ICD |
System Depth | 15.41 cm | See ICD (17.9 cm with mounting pivot) |
System Height (image plane to top) | 28.97 cm | See ICD (16.36 cm enclosure only) |
Weight | 3.2 Kg | Without rack and pinion mounting hardware |
Electrical voltage input | 24 VDC +/- 5% | < 100W power consumption |
Over Temperature Response | Software control |

Spectral Match Values and Irradiance at 1.0 SUN
Wavelength Range(nm) | Measured Irradiance(W/m2) | Percentage of totalirradiance (%) | Spectral match to spectral bins (%) |
---|---|---|---|
300-470 | 121.15 | 14.68 | 87.5-112.5 |
471-560 | 143.97 | 17.45 | 87.5-112.5 |
561-660 | 149.49 | 18.11 | 87.5-112.5 |
661-770 | 135.71 | 16.44 | 87.5-112.5 |
771-920 | 144.75 | 17.54 | 87.5-112.5 |
921-1200 | 130.19 | 15.78 | 87.5-112.5 |