The IK rating indicates how impact-resistant a lighting fixture is. In other words, it shows how well a lamp or luminaire can withstand mechanical shocks.

The IK rating is measured on a scale from 0 to 10:

• IK00 – Very low resistance to impacts

• IK10 – Very high resistance to impacts

The higher the IK rating, the more robust and impact-resistant the fixture is. This is important for use in public spaces, workshops, or outdoor environments where fixtures may be subject to knocks or collisions.