LM-79 Moving Detector Goniophotometer (Mirror Type C)

LSG-6000 Rotating Mirror Goniophotometer (Mirror Type C) is designed in strict accordance with IES LM-79-24 and EN 13032-1:2019 (Type 4) standards. It operates on a principle where the luminaire under test remains stationary, while a probe and a mirror rotate synchronously in a circular path around it. Equipped with a German-made Class L temperature-stabilized photometric probe, Mitsubishi servo drives, and high-precision angle encoders—along with a laser alignment system to ensure the luminaire’s center coincides with the axis of rotation—the system delivers high accuracy and repeatability for full-space luminous intensity distribution measurements. It can also be upgraded to the LSG-6000CCD model by integrating a CCD spectroradiometer, enabling the measurement of spatial color temperature, color rendering index (CRI), and PAR/PPF/PPFD parameters for horticultural lighting, thus providing an all-in-one solution for photometric and colorimetric testing.

LSG-6000 is widely used for evaluating the light distribution performance of various lighting products, including LED luminaires, horticultural lighting, HID lamps, and fluorescent lamps. It comes with professional testing software (available in both Chinese and English) that supports the export of IES and LDT standard photometric files and is compatible with the DIALux lighting simulation software. Fully compliant with domestic, European, and North American certification requirements, the LSG-6000 serves as a precision, certification-grade testing instrument for major lighting manufacturers, research institutions, third-party testing laboratories, and national-level testing facilities.

LSG-6000 Moving Detector Goniophotometric Working Principle

LSG-6000 Moving Detector Goniophotometric Dark Room

Test Parameters:
• Photometric Parameters: 3D luminous intensity distribution, total luminous flux, luminaire luminous efficacy, EEI (Energy Efficiency Index), beam angle, UGR (Unified Glare Rating), isolux/isocandela curves, utilization factor, BUG (Backlight, Uplight, and Glare) rating, LCS (Luminaire Classification System), upward/downward luminous flux ratio, etc.
• Electrical Parameters: Voltage, current, power, power factor, frequency, and harmonics.
• Colorimetric Parameters: Spectral power distribution, CIE chromaticity coordinates (x, y) and (u’, v’), correlated color temperature (CCT), Duv, color rendering index (Ra/R1–R15), CQS, IES TM-30-24 (Rf/Rg), dominant wavelength, color purity, melanopic flux, spatial color temperature, and color non-uniformity (Δu’v’). Also includes parameters for horticultural lighting, such as PAR, PPF, and PPFD.

Standards:

Specifications:

LSG-6000 / LSG-6000CCD Test Size And Weight

Optional Configuration 1: The LSG-6000 / LSG-6000CCD Rotating Mirror Goniophotometer (Mirror Type C) can be equipped with a variety of photometric probes. It supports the testing of ultraviolet (UV) light sources as well as high-precision photometric measurements of LEDs, covering the UVA, UVB, and UVC spectral ranges.

Optional Configuration 2: LSG-6000 / LSG-6000CCD Rotating Mirror Goniophotometer (Mirror Type C) can be equipped with the optional LSRF-3 Lamp Start, Run-up Time and Flicker Test System and CLAMP-LSRF test fixture. It fully complies with standards and regulations such as BASIC, ENERGY STAR V2.1, CA CEC, IEC TR 61547-1:2020 (Note: for dynamic Pst-LM(I) flicker testing under this standard, it is recommended to upgrade the standard AC power supply of the LSG-6000 / LSG-6000CCD to the LSP-500VARC-Pst or LSP-1KVARC-Pst model), CIE TN 006:2016, IEEE Std 1789, EU ErP, SASO 2902-2018, and IEC 60969. It is designed for testing the start-up time, rise time, and flicker performance of light sources, including LEDs and energy-saving lamps.

LSRF-3 Stroboscopic Performance Test

LSRF-3 Test for Lamp Starting, Run-up, and Stabilization

How does Mirror Goniophotometer work?

Goniophotometer adopts the measuring principle of fixed detector and rotating lamp method. The measuring lamp is installed on a two-dimensional rotating worktable, and the luminous center of the lamp coincides with the rotating center of the rotating worktable through the laser beam of the laser sight. 

LISUN LSG-6000CCD LM-79 Moving Detector Goniospectroradiometer (Mirror Type C) – After-sales Frequently Asked Questions (FAQ).
LISUN LSG-6000CCD LM-79 Moving Detector Goniospectroradiometer (Mirror Type C) were in the market for more than 10 years, LISUN engineers service team already summary the most of the After Sales Questions and Answers in the above link. Please read it carefuly, you can solve the most of the problems by yourself if you have some questions while using the instruments. LISUN will be continue to update this pages and more FAQ can be found in this topic link.

Steve Gibbons

We have the LSG-1800BCCD gonio photometer. LISUN is professional and the photometer is nice. LISUN engineer came and installed for us. Now everything is functional. We are glad to cooperate with LISUN.