High Precision Rotation Luminaire Goniophotometer

LSG-1890B / LSG-1800A High Precision Rotation Luminaire Goniophotometer (light distribution curve testing system) employs a testing principle where the photometric probe remains stationary while the luminaire under test rotates. The luminaire can rotate continuously from -180° to +180° along both horizontal and vertical axes, supporting measurement modes for both C-γ (single-arm structure) and B-β (dual-arm structure) coordinate systems. Equipped with a constant-temperature photometric probe, Japanese Mitsubishi servo motors, and a German high-precision angle encoder, the system utilizes a laser alignment device to align the luminaire’s center with the axis of rotation; this ensures precise angular positioning and guarantees high accuracy and repeatability in full-space photometric testing.

High Precision Rotation Luminaire Goniophotometer

LSG-1890B / LSG-1800A high-precision goniophotometer is designed for various general lighting products—including LED luminaires, HID lamps, and fluorescent lights—to meet needs ranging from R&D and performance verification to factory quality control and authoritative third-party testing. It comes with professional testing software (supporting both Chinese and English) and enables the export of standard photometric data files such as IES and LDT. Compatible with lighting simulation software like DIALux, the system meets the standard testing and compliance requirements for lighting products in domestic, European, and American markets.

Test Parameters:
• Photometric parameters: 3D luminous intensity distribution, total luminous flux, luminaire efficacy, EEI, beam angle, UGR (Unified Glare Rating), isolux curves, isocandela curves, utilization factor, BUG rating, LCS (Luminaire Classification System), upward/downward luminous flux ratio, etc.
• Electrical parameters: Voltage, current, power, power factor, frequency, harmonics (LSG-1890B).

Standards:

Specification:

LSG-1800A/LSG-1890B Test Size And Weight

Optional Configuration 1: The LSG-1890B / LSG-1800A High Precision Rotation Luminaire Goniophotometer supports a range of optional photometric probes, enabling testing of UV light sources and high-precision LED photometry across UVA, UVB, UVC, and visible light wavebands.

Optional Configuration 2: The LSG-1800A / LSG-1890B High Precision Rotation Luminaire Goniophotometer can be equipped with the LSRF-3 Lamp Start, Run-up Time and Flicker Test System and CLAMP-LSRF test fixture. This setup 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-1800A/LSG-1890B 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 used to test parameters such as start-up time, rise time, and flicker performance for light sources like LEDs and energy-saving lamps.

LSRF-3 Stroboscopic Performance Test

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

What are the types of goniophotometers?

The types of Goniophotometers can be basically divided into Type A, Type B and Type C. For a detailed description, please refer to the 1987 edition of CIE 70. The difference between them lies in the way the lighting equipment rotates during the measurement and the photometric data obtained during this measurement.

What and how does a goniophotometer measure?

Goniophotometer is a instrument used to measure the light distribution performance of lamps. Goniophotometer measures the spatial light intensity distribution of lamps or light sources, total luminous flux and lamp efficiency and other parameters.

Goniophotometer need to work in larger darkroom. Use low-reflectivity materials in the room to avoid reflected light from entering the photo detector. The goniophotometer tests the illuminance and light intensity of the lamp at all spatial angles to calculate the absolute luminous flux value of the lamp and all other photometric parameters related to the space.

LISUN LSG-1890B High Precision Rotation Luminaire Goniophotometer – After-sales Frequently Asked Questions (FAQ).
LISUN LSG-1890B High Precision Roation Luminaire Goniophotometer 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.