Join us at 3:00 PM on September 22! Yang Xiong | Photobiological Safety Measurement Technologies and Practices

Introduction

The town of Guzhen is renowned at home and abroad as the “Capital of Chinese Lighting.” The China·Guzhen International Lighting Expo, with its keen grasp of the pulse of the lighting industry, provides suppliers and buyers with a direct, convenient, and highly cost-effective one-stop trading platform.

The 2026 China (Guzhen) International Lighting Expo (Autumn), also known as the 35th Guzhen Lighting Expo, will be grandly held from October 22 to 25, 2026, in Guzhen Town, Zhongshan City, Guangdong Province. The event is hosted by the China Illuminating Engineering Society and organized by Zhongshan Guzhen Light City Expo Co., Ltd. Grounded in Guzhen—the “Capital of Chinese Lighting”—the expo leverages a lighting industry cluster with annual sales exceeding RMB 100 billion.

At Mingren Online, the Guzhen Lighting Expo will continue to share industry highlights, analyze lighting market trends, and spark lively online and offline discussions among industry professionals.

This issue features Dr. Yang Xiong, Deputy Director of the Optoelectronics Research Institute at Hangzhou Yuanfang Optoelectronics Information Co., Ltd..

Organizational Structure

Host

Zhongshan Guzhen Light City Expo Co., Ltd.

Organizer

China Light All-Media · Ming Classroom

Theme

Measurement Techniques and Practical Applications of Photobiological Safety

Date and Time

Tuesday, September 22, 2026

15:00–16:00

Main Content

Measuring photobiological hazards is a critical method for assessing the degree of human exposure to artificial light sources. This process is based on the IEC 62471 series standards—adopted in China as GB/T 20145-2006—and covers six major hazard categories, including ultraviolet, blue light, and thermal effects, along with four risk levels ranging from RG0 to RG3. It applies to continuous and pulsed light sources and luminaires across the ultraviolet, visible, and infrared spectra. In practice, measurements face numerous challenges, such as selecting appropriate field-of-view angles and test distances, aligning brightness measurements for small light sources, identifying maximum hazard zones, synchronizing special triggers for pulsed sources, and controlling stray light to ensure accuracy. A complete measurement system typically comprises a wide-band spectral radiometer, optical receiving accessories, a multi-axis adjustment turntable, and automated analysis software.

This presentation will begin with an overview of photobiological safety standards, explain their measurement principles and key difficulties, and share typical measurement systems and real-world case studies.

Guest Speaker

Dr. Yang Xiong

Hangzhou Yuanfang Optoelectronics Information Co., Ltd.

Deputy Director of the Optoelectronics Research Institute

Dr. Yang specializes in research and development related to standard radiation sources, photobiological safety testing, automotive lighting inspections, and display measurement equipment, while actively participating in the formulation of relevant standards. He earned both his bachelor’s and doctoral degrees in Optical Engineering from Zhejiang University and obtained a joint PhD in Applied Physics from the Royal Institute of Technology in Sweden.

How to Join

Ming Classroom Quick Access

This live broadcast will take place on the Ming Classroom platform. Simply scan or recognize the QR code below, or click “Read Original Article” at the end of this text to enter the live stream directly.

Other Ways to Participate

You can also watch via the official video account of the Guzhen Lighting Expo.