EN 62471 – Photobiological Safety Test Standard for LED Lamps

As LED lights become more and more popular, we find that more and more stadium and street lighting bidding projects require lamps to meet the EN 62471 standard and not cause photobiological risks. Let’s take a look at what EN 62471 is.

EN 62471 is an international standard for photobiological safety testing of LED lamps. It was issued by the European Union and completely replaced the requirements for energy levels of LED products in the old IEC/EN60825 standard, adding photobiological requirements. It is designed to assess the potential risks of light exposure to human eyes and skin. The standard is divided into two parts: risk analysis and irradiation performance evaluation. In the risk analysis, different risk levels are determined based on the potential hazards of light sources in different spectral ranges to the eyes and skin. The irradiation performance evaluation is to evaluate the safety of the light source to the human body by measuring the light parameters radiated by the light source, such as the radiation spectrum, radiation intensity, etc.

According to this standard, the wavelength range of optical radiation involving eyes and skin is 200~3000nm, and the photobiological radiation safety of non-laser products such as LEDs is divided into four levels according to different degrees of hazard. Specifically, the exemption class (no hazard) means that no photobiological radiation hazard will be caused under the specified limit conditions; Group I (Low-Risk) means that no hazard will be caused under normal use conditions; Group II (Moderate-Risk) and Group III (High-Risk) respectively indicate that mild and severe hazards may be caused under specific conditions of use. If the light source is assigned to the “safe” group (exempt group) or the low-risk group, a detailed workplace assessment is not required because there is no photobiological safety hazard issue.

As a new type of light source, LED light source is increasingly used. However, the potential dangers of radiation from LED light sources of different spectra to the human body need to be evaluated. The emergence of the EN 62471 standard enables LED lamp manufacturers and consumers to have a clearer understanding of the potential risks of LED light sources to the human body, so as to better select and use LED lamps. In general, the EN 62471 standard is formulated to protect the health and safety of LED lamp users, through strict testing and evaluation procedures, to ensure that the photobiological safety of LED light sources meets international standards, and to promote the healthy development of the LED lamp industry.

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