With the introduction of LED technology, the radiation it emits is almost completely concentrated in the visible light range with wavelengths between 380nm and 780nm, and ultraviolet radiation and infrared hazards are almost negligible. Therefore, photobiological hazards are mainly limited to photochemical effects on the retina. The human retina is most sensitive to the photochemical effects of optical radiation in the wavelength range of 400n to 500n. The International Commission on Non-Ionizing Radiation Protection (ICNIRP) has developed a spectral weighting function and recommended limit standards for preventing photochemical retinal damage, known as “blue light hazard.”
Clause 32.2 of the latest version of the standard IEC 60335-1:2020/AMD1:2025 For electric light sources and lamps built into the appliance, mainly emitting visible light and used to illuminate spaces or objects, their compliance shall be checked in accordance with the measurement procedures described in the IEC 62471-7 standard.

In order to thank new and old customers for their support to Ningbo Xuntong Standard Technical Service Co., Ltd., we have launched a free “Blu-ray Hazard” test activity. Each company limits one product to IEC62471-7 standard testing. Event time: December 23, 2025 to January 29, 2026.