The IP code describes protection of electrical equipment enclosures against solid particles and water. IP67 and IP69 are common for machine lights. A higher number does not automatically mean resistance to all chemicals or any cleaning method.
How to read an IP rating
The first digit relates to solid particles; 6 means dust-tight. The second digit describes the water-protection test. The classes are defined by IEC 60529.
IP67
Dust-tight construction and protection during temporary immersion under specified test conditions. IP67 alone does not mean resistance to pressure washing.
IP69
Dust-tight construction and protection during a high-pressure, high-temperature water-jet test. Suitable for demanding cleaning when used within the manufacturer’s conditions.
Why a switch can change the protection rating
The rating applies to the complete light, not only the aluminium head. A mechanical switch or different cable gland can become the weakest point. Some InLED versions without a switch are therefore IP69, while the RV7 switch version is IP67 overall.
IP rating is not the same as chemical resistance
The IP test covers dust and water ingress, not long-term exposure to cutting fluids, oils, solvents or disinfectants. In chemically demanding environments, assess the seals, cover glass, cable gland and housing materials. This is why LeanLED uses a dedicated chemically resistant outer tube.
What to check for a specific machine
- Direction and pressure of the coolant flow.
- Whether the light is pressure-washed or only wiped clean.
- Long-term contact with oil, emulsion or solvent.
- Ambient temperature and the risk of impact from chips.
- Protection rating of the complete ordered version including switch and cable outlet.