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It is very common to see LED lights widely used in commercial, industrial and sporting applications. They are common place and widely used in warehouses, parking lots, manufacturing, gymnasiums and intense industrial applications. It’s well known that LED fixtures are chosen for  cost-effectiveness and significant energy saving. However, in some applications, cost savings alone isn’t enough. Some applications need to be rugged, robust and impact resistant. They need to withstand bumps, hits and strikes and still operate. They must stay intact to ensure the safety of the people below. For activities like tennis, basketball, hockey and others, random unintentional ball strikes should not affect the operations of the light.  The IK Code of the fixture indicates the protection against strikes, bumps and hits of foreign objects.

What is an IK Code?

The IK Code applies to the level of protection from being struck by an external force on a lighting fixture’s enclosure. The origins of the IK Code started from a European Impact Standard: BS EN 50102. It was converted to an international standard in 2002. The standard was renumbered EN 62262.

Previously, an additional digits was added to a fixtures IP rating ie. IP67(9), where the (9) designated its IK Code. But this system was non-standard. So a new standard was developed with 2 digits designating the fixtures impact resistance.

What is the IK Rating?

IK rating consists of two numbers, starting at IK01 up to IK10. The higher the number, the stronger the protection. Joule is unit of energy. It is the measurement used in testing impact resistance.

The IK rating is tested using three different hammers. These are

pendulum hammer – used for testing impact from IK01 to IK06
spring hammer – tests the impact from IK07 to IK10
free-fall hammer – applicable to test the whole range

If a higher level of protection than IK10 is reached, the fixture is rated at IK10+. 

IK Rating Level of Protection
IK00 Not protected.
IK01 Protected against an impact of 0.14 joules. This is equal to the impact of a 0.25-kg object dropped from 56 mm above the impacted surface
IK02 Protected against an impact of 0.2 joules. This is equal to the impact of a 0.25-kg object dropped from 80 mm above the impacted surface
IK03 Protected against an impact of 0.35 joules. This is equal to the impact of a 0.25-kg object dropped from 140 mm above the impacted surface
IK04 Protected against an impact of 0.5 joules. This is equal to the impact of a 0.25-kg object dropped from 200 mm above the impacted surface
IK05 Protected against an impact of 0.7 joules. This is equal to the impact of a 0.25-kg object dropped from 280 mm above the impacted surface
IK06 Protected against an impact of 1 joule. This is equal to the impact of a 0.25-kg object dropped from 400 mm above the impacted surface
IK07 Protected against an impact of 2 joules. This is equal to the impact of a 0.5-kg object dropped from 400 mm above the impacted surface
IK08 Protected against an impact of 5 joules. This is equal to the impact of a 1.7-kg object dropped from 300 mm above the impacted surface
IK09 Protected against an impact of 10 joules. This is equal to the impact of a 5-kg object dropped from 200 mm above the impacted surface
IK10 Protected against an impact of 20 joules. This is equal to the impact of a 5-kg object dropped from 400 mm above the impacted surface

Application of IK Codes

How do you choose the fixtures with proper IK code for your specific needs and application?

Knowing the potential impact threat to your fixture would indicate your need. Fortunately for you, many of our IK rated fixtures are IK08 or above rated. All our UFO High Bays are IK08 rated, while all our explosion proof lights are IK10 rated. We offer IK08 shoebox / parking lot lights and IK08 rated flood lights / stadium lights. Every fixture that is IK rated has an IK symbol listed with the fixture as well as indicated in the specification

About the Author

Dwayne Kula is President of LED Lighting Supply. On any given day, Dwayne is writing content for the site and helps manage the marketing initiatives that are on-going. He has a Software Engineering degree and still dabbles in writing software for the company as needed. When not working, he enjoys spending time with his family, working out, playing the occasional game of golf and exploring New England.

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