Several key points for UL certification of LED filament lights-Xiamen Yaltan Lighting Company Limited-Panel,Plastic

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Several key points for UL certification of LED filament lights

For a long time, LED filament lights have faced two major issues in order to pass UL certification in the United States: first, if the lamp breaks, it will turn off; The second is that the glass shell cannot be broken into pieces, only into powder to avoid harm to the human body.

The first issue can be addressed on the power supply, but many manufacturers have different solutions to the second issue, which cannot effectively guarantee the success rate of certification.

Below, from the perspective of UL certification, we have explained the issues and key points that need to be paid attention to when passing the certification for LED filament lamp glass lampshade.

To solve the problem of LED filament lamp glass lampshade falling and breaking, the most common solution currently used by LED manufacturers is to add some glue, glass glue or silicone to the inside or outside of the glass shade, pull the glass, increase its strength, and prevent it from breaking when dropped, so that there is no danger when touched by fingers.

But this solution will face the problem of glue not being certified. How to solve the problem of authentication in this situation? One scenario is that UL will measure the thickness of the control party's materials, RTI, and actual samples.

If the coating (adhesive) is certified, the manufacturer and company number of the adhesive should be controlled and recorded in the report. If this coating is not certified, some random tests need to be conducted to identify the material composition. This type of test is relatively rare in China and usually needs to be sent to Taiwan for testing. We also need to verify that the material cost has not changed through an annual FUS test.

Another way is to obtain UL certification for LED filament lampshades that have ruptured, which is to update UL standards in the first half of the year. It is acceptable for the glass lampshade of LED filament lamps to break after falling, but there are clear requirements and regulations regarding the area and size of glass breakage.

Firstly, three samples must be provided for drop testing, and then it is stipulated that the area of the lampshade glass that falls after the drop test is broken must be greater than 75% of the area in the box of the type of bulb shown in the following figure.

That is to say, it is required that the damaged area of the glass lampshade should account for 75% of the area of the other parts of the lamp besides the lamp head (glass lampshade+other accessories), rather than our understanding of only needing to account for 75% of the area of the glass lampshade. And it also needs to be labeled. This is to avoid safety hazards caused by fragmentation into pieces. To pass UL certification, the above requirements must be met.

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The lighting industry refers to the design, production and sales of lamps and accessories and their accessories. Lamps and lanterns are an indispensable and important element in urban architecture and interior decoration, and are widely used in home, commerce, industry, public places and other fields.

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