Lisun Introduced The Difference Between Spectroradiometer & Integrating Sphere VS Goniophotometer Test
According to CIE127, EN13032-1 and LM-79-19, there two ways to test lighting lamps for photometric parameters: Spectroradiometer & Integrating Sphere and Goniophotometer System. What’s difference between them? Here we give you a brief introduction.
1. What’s the test principle difference between Spectroradiometer & Integrating Sphere VS Goniophotometer Test?
The principle of the Spectroradiometer & Integrating Sphere test system is to measure the illuminance of a certain point on the integrating sphere, calculate the radiant flux at a certain wavelength, and finally calculate the total luminous flux of the light source, but the Goniophotometer generally measures the light intensity distribution of the luminaires and calculates the luminous flux of the luminaires
2. How to choose the Spectroradiometer & Integrating Sphere or the Goniophotometer to test the lamps?
The Spectroradiometer & Integrating Sphere system is suitable for single LEDs, relatively small LED lamps and 360degree light source. LISUN LPCE-2 test speed is very quick and normally can finished one measurements less than 5seconds.
The Goniophotometer is suitable for testing of large lamps such as high-pressure mercury lamps, sodium lamps and LED street luminaires with higher measurement accuracy. Most third-party testing organizations and large national laboratories generally use LISUN LSG-6000 LM-79 Mirror Type C goniphotometer.
3. What’s the test parameters for Spectroradiometer & Integrating Sphere and Goniophotometer?
LISUN LPCE-2 Spectroradiometer & Integrating Sphere system can measure the following parameters:
• Colorimetric: Chromaticity coordinates, CCT, Color Ratio, Peak Wavelength, Half Bandwidth, Dominant Wavelength, Color Purity, CRI, CQS, TM-30 (Rf, Rg), Spectrum Test
• Photometric: Luminous Flux, Luminous Efficiency, Radiant Power, EEI, Energy Efficiency Class, Pupil Flux, Pupil Flux Efficiency, Pupil Factor, Cirtopic Flux, Plant Growth Lamp PAR and PPF
• Electrical: Voltage, Current, Power, Power Factor, Displacement Factor, Harmonic
• LED optical maintenance test: Flux VS time, CCT VS time, CRI VS time, Power VS time, Power Factor VS time, Current VS time and Flux Efficiency VS time.
LISUN LSG-6000 Type C goniophotometer can measure the following parameters:
Luminous Intensity Data, Luminous Intensity Distribution, Zonal Luminous Flux, Luminaries Efficiency, Luminance Distribution, Coefficient Of Utilization, Luminance Limitation Curves Glare, Maximum Ratio of Distance to Height, Equal Illuminance Diagrams, Curves of Luminaires VS Lighting Area, Isocandela Diagrams, Efficient Luminescence Angle, EEI, UGR, etc.
4. What’s the lumen test accuracy difference for Spectroradiometer & Integrating Sphere VS Goniophotometer?
Both Spectroradiometer & Integrating Sphere and Goniophotometer system can test lumen, but the Spectroradiometer & Integrating Sphere is the relative lumen test method, so if the EUT luminaires figures are much difference than the standard lamp, or the EUT luminaires beam angle is much smaller, then the test tolerance will be bigger, while the Goniophotometer system is the absolute lumen test method, the lumen test results will be more accuracy than the Spectroradiometer & Integrating Sphere test method.
Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.
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