How to Take the Guesswork out of LED Compatibility

    November 2, 2015

LEDs are expected to demonstrate reliability and durability despite challenges that include extreme temperatures, vibration and UV rays. LED-compatible adhesives play a key role in achieving those expectations.

But establishing the necessary LED compatibility takes time, money and hands-on testing. We are at the forefront of that testing, determining which adhesives have the right chemistry to give you the edge you need for successful LED lighting manufacturing and assembly.

For LED lighting, incompatibility can lead to volatile organic compounds (VOCs) that outgas, resulting in discoloration, decreased lighting intensity and lens fogging – generally impaired performance.


LEDs trending in lighting industry

We know that LEDs are being asked to do more – lining the trailer of an 18-wheeler, affixed to the front of a motorcycle, flooding a city street with light from a street lamp, or backlighting a sign that is only visible in the distance. LEDs are taking over the lighting world and we recognize that performance, reliability, durability and cost are vitally important to your success.

And that’s where we can help you. You want better performance, and we want to help you get there by suggesting the right adhesive for the job – adhesives that you can be sure will provide structural strength, cure quickly, and withstand harsh environments and vibration. We recommend the adhesive that can do the job because we test it – thoroughly – for LED compatibility.

So what do we consider when testing for optimal LED performance?

Five key elements of LED lighting assembly

  1. LED chip package

  2. Size of lens

  3. Adhesive chemistry

  4. Amount of adhesive

  5. Proximity to LED

Five challenges to LED lighting success

  1. Extreme temperatures

  2. Rain, snow, sleet

  3. UV rays

  4. Vibration

  5. Incompatibile VOCs

Testing the limits

We conduct product testing using kits provided by Cree, one of the world’s largest LED manufacturers. We’ve tested over 150 of our products, spanning various chemistries and offering a broad range of solutions. The tests – from inception to results – take eight weeks and ongoing monitoring.

We begin by applying a product directly to two LEDs, as well as applying it adjacent to two additional LEDs (to test for indirect effects). The product is allowed to cure for one week before sealing the lens.  Product is then applied onto one more LED, as well as adjacent to one more LED. Both LEDs are then sealed immediately. 

We get results

For six weeks, we closely monitor the LEDs. We devote the final week to interpreting and documenting results. If even one indirect or one direct LED fails, even if the other two pass, the product is deemed a failure for that category.

Through extensive product testing, we’ve compiled a comprehensive product offering for LED compatibility. Using our results, we can suggest both the correct adhesive and the correct amount of adhesive for your needs; and ensure that our products meet the demands of your fast-evolving industry.

Some key compatible products that have found success in the LED market include:

Direct Compatible

Indirect Compatible

Making your job faster and less costly 

We know that your product testing begins where ours ends. But our results give you an advantage when choosing the right adhesive for your LED assembly, eliminate some of the guesswork and put you closer to LED success. Learn more about our LED solutions and, when you’re ready, contact us.

Want to learn more about low-pressure molding? Visit our website.

About the Author, Michael Pomykala

Mike is an Application Engineer for Henkel North America, based in Rocky Hill, CT. He is responsible for specialized technical support of the Electrical and Optical market and Defense market for North America. Mike also provides general technical support for the North Central region of the United States. Mike has been with Henkel for two years. He spent his first year in the Prism Program – a rotational program that provides training in various business roles throughout the General Industry segment at Henkel. Mike also holds Bachelors and Masters degrees in Chemical Engineering from the University of Connecticut.

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