Research on Technical Standards and Application of Flicker Test

Abstract

With the popularization of LED lighting technology, flicker has become a key factor affecting light environment health and product quality. As the core equipment for quantitatively evaluating the flicker characteristics of light sources, flicker test instruments directly determine the authority and reliability of detection results in terms of detection accuracy, sampling rate and standard compatibility. Taking the LISUN LSRF-3 flicker test device as the research object, this paper systematically expounds the core technical advantages of its Class A high-speed photometric probe and up to 100kHz sampling speed. It analyzes the design adaptability to domestic and international mainstream standards including BASIC, Energy Star V2.1, CA CEC, ASSIST, IEC TR 61547-1:2020 IEC-Pst, CIE SVM and IEEE Std 1789, and clarifies its special application value in the flicker test of various light sources such as LED lamps, luminaires and energy-saving lamps. Combined with the comparison of key technical parameters and measured data, it is proved that the instrument can accurately quantify core indicators such as flicker index, flicker depth, Pst value and SVM value. It provides full-process technical support for R&D optimization, quality control, compliance certification and market access of lighting products, meeting the dual requirements of laboratory precision testing and mass production line inspection.

Introduction

In the lighting industry, flicker refers to the periodic fluctuation of luminous flux generated by light sources, which is mainly caused by drive circuit PWM dimming, power supply voltage fluctuation and light source aging. Although high-frequency flicker is difficult to be perceived by human eyes, long-term exposure to flickering light environments easily causes visual fatigue, headache, dizziness and inattention, and even harms eyesight development and sleep quality, especially for teenagers, office workers and special operators. Therefore, governments and industrial organizations around the world have issued strict flicker testing standards one after another, requiring mandatory flicker performance inspection for lighting products. Flicker test equipment has become essential core equipment for quality control and compliance certification in the lighting industry.

Many conventional flicker testing devices on the market suffer from low sampling speed, insufficient probe precision, limited standard adaptation and poor data stability, which cannot meet the strict requirements of high-end LED luminaires, smart lighting products and export certification. Developed by LISUN, the LSRF-3 flicker test system has been fully upgraded in core hardware, algorithm design and standard adaptation. Equipped with a Class A high-speed photometric probe, it achieves a high sampling rate of 100kHz. It is fully designed in accordance with BASIC, Energy Star V2.1, CA CEC, ASSIST, IEC TR 61547-1:2020 IEC-Pst, CIE SVM, IEEE Std 1789 and other global mainstream flicker standards. It is specially used for professional flicker measurement of LED lamps, luminaires, energy-saving lamps and other light sources, and satisfies both precise laboratory R&D analysis and high-efficiency batch testing on production lines, delivering professional, efficient and compliant testing solutions for lighting flicker control.

LSRF-3 Lamp Start, Run-up Time and Flicker Test System

Core Hardware Technical Advantages of LISUN LSRF-3 Flicker Test

Class A High-Speed Photometric Probe

The photometric probe is the core sensing component of flicker test equipment, whose precision, response speed and spectral matching directly affect the collection accuracy of flicker signals. The LISUN LSRF-3 flicker test instrument is equipped with a professional Class A high-speed photometric probe, complying with CIE international first-class photometric measurement standards.

First, it realizes accurate spectral matching and strictly fits the human eye spectral luminous efficiency function V(λ), accurately capturing luminous flux fluctuations in the visible light band and avoiding data distortion caused by spectral deviation. Second, it features ultra-fast response with high-sensitivity sensors, tracking high-frequency flicker signals in real time without delay and restoring the dynamic fluctuation curve of light sources. Third, it adopts low-noise and high-stability design, with built-in dark current compensation and temperature calibration modules to suppress ambient light interference and temperature drift, ensuring stable detection accuracy in a wide illuminance range.

100kHz High Sampling Speed

Flicker signals cover a wide frequency range, and most LED lamps adopt PWM dimming within a high-frequency range. Traditional low sampling rate instruments are prone to signal missing and waveform distortion, failing to identify potential high-frequency flicker risks. The LSRF-3 flicker test device is built with a 100kHz high-speed data acquisition system. It fully covers the full-band flicker signals of mainstream light sources, restores various flicker waveforms accurately, and provides reliable basic data for the calculation of flicker index, modulation depth and other parameters. Meanwhile, it is fully adapted to high-frequency dimming scenarios of smart LED lamps, meeting the strict testing specifications of IEEE Std 1789.

Multi-Standard Compatible Design to Meet Global Testing Specifications

The prominent advantage of LISUN LSRF-3 flicker test solution is full global standard compatibility. It is completely designed according to multiple international authoritative standards:

– BASIC: The basic flicker testing specification, defining the calculation methods of fundamental flicker parameters for general lighting screening.

– Energy Star V2.1: Mandatory standard for North American market access, restricting flicker limits for energy-saving lighting products.

– CA CEC: California energy efficiency regulation, implementing strict control on lighting flicker modulation ratio.

– ASSIST: Professional industry standard focusing on visual health and flicker risk classification.

– IEC TR 61547-1:2020 (IEC-Pst): Core EU certification standard, adopting Pst value to evaluate visible flicker.

– CIE SVM: International unified flicker evaluation specification, measuring flicker impact through SVM indicators.

– IEEE Std 1789: High-brightness LED flicker safety standard, dividing health risk levels for high-frequency flicker.

One-click switching of different standard modes enables automatic algorithm matching, effectively supporting domestic quality inspection and global export certification.

Professional Application for Multiple Light Sources

The LISUN LSRF-3 flicker test instrument is professionally developed for LED lamps, luminaires, energy-saving lamps and other lighting products. It is widely applicable to LED bulb lamps, LED panel lights, industrial flood lights, compact energy-saving lamps, fluorescent lamps and other light sources. It is widely used in health lighting fields such as classroom education lighting, office lighting and home eye-care lamps. It can not only complete precise performance analysis in laboratories, but also support rapid batch sampling inspection on production lines, forming a complete quality testing system for the lighting industry.

Core Technical Parameter Table

 Conclusion

As indispensable professional equipment for lighting flicker detection and quality certification, flicker test instruments determine the compliance and market competitiveness of lighting products. The LISUN LSRF-3 flicker test system adopts Class A high-speed photometric probe and 100kHz high sampling rate to achieve high-precision collection of full-band flicker signals. With comprehensive multi-standard design, it meets the testing demands of EU, North America and global markets. Targeting at LED lamps, luminaires and energy-saving lamps, it covers laboratory R&D and production line batch testing scenarios.

With high testing precision, complete standard adaptation and stable operation performance, LISUN LSRF-3 provides systematic flicker testing solutions for lighting enterprises, helping optimize product design, control production quality, and smoothly pass international certification. It also continuously promotes the standardized and healthy development of the global healthy lighting industry.