How to perform IEC62776 testing for LED tubes

In December 2014, the safety standard for double-ended LED tubes, IEC 62776 (ed.1.0):2014, was officially published; in May 2015, the corresponding European standard EN 62776:2015 was also released, 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: dual-ended input, designed to directly replace traditional fluorescent tubes without involving internal circuit changes in the fixture; G5 or G13 lamp ends; power not exceeding 125W; input voltage not exceeding 250V.

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

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 Lamps was updated in May 2014, with the General Safety Requirements standard IEC60598-1:2014 (8th Edition) officially published and released, replacing the previous version IEC60598-1:2008 (7th Edition); in January 2015, the corresponding EN standard EN 60598-1:2015 also came into effect and is set to officially replace the previous version EN 60598-1:2008+A11:2009 on October 20, 2017. Key updates include:

1. Standard Updates: Updated certain IEC/EN 60598-2 standards based on the structural characteristics of different products.

2. Focuses on LED lighting, enhancing safety requirements for optical, electrical, and structural aspects of LED lighting.

3. Updated certain testing requirements for Class III products. Specific update items:

1) Based on the above three aspects, the main updates to the standards include:

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

b) IEC/EN 60598-2-20 (String Lights): The new edition published on September 30, 2015, will only apply to standard string lights and no longer include sealed water pipe lights (RopeLight).

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

2) The updated requirements for LED lighting primarily include:

a) Due to the uniqueness 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 specifications.

b) Added explicit hazard level 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 different hazard levels.

3) Updates for Class III products mainly include:

a) Enhanced insulation requirements between different voltage levels in lines within control lamps that include transformers/drivers and other controllers.

b) Relaxation of the external wire diameter requirements for Class III lighting fixtures or the Class III structural parts within lighting fixtures.

c) Exempts the creepage distance and electrical clearance requirements for lines with working voltages not exceeding 25Vr.m.s. or 60Vd.c.