What are the standards and procedures for EN62778 blue light hazard testing of LED lighting products? In recent years, the main hazards of blue light have been manifested in eye pathologies such as myopia, cataracts, and macular degeneration, as well as in human circadian rhythms. As a result, the blue light hazard of many lighting products has been a subject of much debate.

In the updated EN60598-1 8th edition, the added requirements for blue light hazard in marking and structural requirements introduce new concepts such as blue light hazard, Risk Group (RG), Ethr, etc. Simultaneously, it stipulates that the evaluation of blue light hazard in lighting products must comply with the regulations of EN62778. Therefore, LED lighting products must undergo the corresponding blue light hazard testing to safely enter the market.

Introduction to Blue Light Hazard Testing

The measurement and evaluation standards for the hazards of LED blue light primarily include IEC/TR 62778, IEC 62471, and IEC 62471-2, among others. IEC 60598-1 adopts the IEC/TR 62778 standard, "Application of IEC 62471 for the assessment of blue light hazard to light sources and luminaires." IEC/TR 62778 simplifies the measurement and evaluation of blue light hazards for light sources and luminaires based on IEC 62471. Considering the long LED supply chain, and the increasing variety of products from LED chips to LED luminaires, from upstream to downstream of the industry, IEC/TR 62778 recommends an evaluation method for the transmission of blue light hazards from light sources to luminaires to alleviate testing burdens.

The foundation standard within the IEC system addressing photobiological hazards of lighting products is the IEC 62471 series standards. Given the product chain involved in LED lighting products, including LED chips, encapsulation, modules, and lamps, conducting retinal blue light hazard assessments at each product stage would result in a significant amount of redundant work. In response, the IEC Technical Committee IEC/TC34 published the technical report IEC/EN 62778:2014, which aims to assess the blue light hazards of LED sources and lamps using the IEC 62471 standard.

In the IEC 60598-1 8th edition, the newly added requirements for blue light hazard in marking and structural requirements introduce several new concepts, such as blue light hazard, Risk Group (RG), Ethr, etc. Meanwhile, it also stipulates that the evaluation of lighting blue light hazard shall be conducted in accordance with the provisions of IEC EN 62778.

LED Lighting Equipment EN62778 Standard

From EN 62471 to ENTR 62778: 2014

EN 62471 is a comprehensive parallel standard that describes all potential health hazards from the ultraviolet, visible, and infrared wavelengths of the spectrum.

EN/TR 62778:2014 is a technical report that addresses only the 4.3.3 and 4.3.4 clauses described in the IEC 62471:2006 standard regarding blue light hazard to the retina.

2. EN/TR 62778:2014 - Basis for Evaluation Methods

EN/TR 62778:2014 outlines several levels of application for LED lighting products, stating that the hazard classification of primary sources can be transferred to their subsequent products.

Testing Requirements and Objects for IEC/EN62778 of LED Luminaires

The measurement and evaluation standards for the blue light hazard primarily include EN/TR62778, EN62471, IEC, etc., which utilize weighted radiance or weighted irradiance to assess and classify.

Standard EN62471 and IEC/TR primarily measure and evaluate the radiation hazards of individual light sources or luminaires. EN/TR62778, based on IEC6, emphasizes the transmission of blue light hazard information from light sources to luminaires.

EN/TR62778 primarily measures light sources, can directly measure lighting fixtures, and redefines the illustrated three safety levels (RG0 unlimited, RG1 unlimited, and Ethr for RG2).

LED Lighting Blue Light Hazard Testing Process

1. Project Application — Submission of application to the regulatory authority of the testing institution.

2. Documentation Preparation — In accordance with requirements, the company prepares the relevant certification documents.

3. Product Testing – The company will send the samples to be tested to the laboratory.

4. Reporting – Certified engineers draft reports based on verified test data.

5. Submission for Review — Engineers will review the complete report.

6. Issue the Report – The report will be issued after it has been thoroughly reviewed and deemed error-free.

Our company boasts a fully-equipped testing and certification laboratory, capable of issuing EN62778 Blue Light Hazard Testing reports. For those in need of such a report, please call 135-2877-4248 to contact us for processing.