Introduction to IEC 62776 Testing

In December 2014, the safety standard for double-end LED tubes, IEC 62776 (ed. 1.0): 2014, was officially published and released; in May 2015, the corresponding European standard EN 62776: 2015 was also issued, providing a theoretical basis for safety assessment for LED tube manufacturers exporting to Europe.

Standard Full Name: IEC/EN 62776 – Double-capped LED lamps designed for retrofitting linear fluorescent lamps – Safety specifications. Scope: This standard applies only to LED tubes that meet the following conditions: double-ended input, designed to directly replace traditional linear fluorescent tubes without altering the internal wiring of the fixture; G5 or G13 lamp heads; power not exceeding 125 W; input voltage not exceeding 250 V.

Note: LED tubes that require internal wiring changes during replacement are not within the scope of this standard's assessment. Assessment Items – Based on the above principles, this standard primarily focuses on evaluating: Documentation Requirements: Label Requirements: Is it suitable for fluorescent lamps with line ballasts? Is it suitable for fluorescent lamps with high-frequency ballasts? Instruction Manual Requirements: Clear and detailed instructions for tube replacement are required. Testing Requirements: Dimension and Gauge Requirements: Product dimensions must meet the standard tube size requirements; they must also maintain standard dimensions under expected high and low-temperature operating conditions. Replacing traditional fluorescent tubes directly within the fixture should not compromise the fixture's safety.

LED tubes do not cause additional harm to users' products from extra UV, blue light, etc. The IEC/EN 60598-1 General Safety Requirements for Luminaires version was updated in May 2014, with the IEC 60598-1:2014 (8th edition) standard officially published and released, replacing the previous version IEC 60598-1:2008 (7th edition); in January 2015, the corresponding EN standard EN 60598-1: 2015 was also officially enforced and is set to replace the previous version EN 60598-1:2008+A11:2009 on October 20, 2017. Key updates include:

Update to Standards: Certain IEC/EN 60598-2 standards have been revised based on the structural characteristics of different products.

2. With a focus on LED lighting, additional safety requirements for optical, electrical, and structural aspects of LED lighting have been introduced.

3. Updated certain testing requirements for Class III products. Specific updates included:

Based on the aforementioned three aspects, the updates to the standard mainly include:

a) IEC/EN 60598-2-6 (Lamp Luminaires with Built-in Transformers, Tungsten Filament): This standard will be abolished upon the official implementation of the new version, with all tests already incorporated into the revised IEC/EN 60598-1.

b) IEC/EN 60598-2-20 (String Lights): The newly published edition of the standard, effective as of September 30, 2015, will only apply to ordinary string lights and will no longer include sealed pipe lights (Rope Light).

(c) IEC/EN 60598-2-21 (Sealed Pipe Light Rope Light): The requirements for pipe lights were separated from the original string light standard and were officially published as a standalone standard on September 30, 2015.

2) The updates to the requirements for LED lighting mainly include:

Due to the specific nature of LED and other light sources, they are categorized into replaceable general light sources, non-replaceable light sources, and user-unreplaceable light sources. Additionally, different light source types require distinct labels, manuals, and structural requirements.

b) We have added explicit hazard classification requirements (RG0/RG1/RG2/RG3) for blue light damage from LED sources. Corresponding labels, instructions, and installation requirements for fixed lighting fixtures are provided based on the different hazard levels.

3) The updates for Class III products mainly include:

Increased insulation requirements between different voltage levels in circuits of controllers for lighting with transformers/drivers, etc.

b) Relaxed the external wire diameter requirements for Class III lighting fixtures or the Class III structural components within lighting fixtures.

c) Exemptions are provided for creepage distances and electrical clearances for circuits with working voltages not exceeding 25Vrms or 60Vdc.