IP Ratings for Vapor Tight Washdown LED Fixtures
How to Read the Two Digits
IP stands for Ingress Protection, defined under IEC 60529. The first digit rates solids on a 0 to 6 scale, ending at dust tight. The second rates liquids on a 0 to 9K scale, ending at close-range high-pressure, high-temperature jets. An X in either position means that side was never tested, not that it passed. Open the chart below for the full breakdown of every level.
Why IP Ratings Matter for Vapor Tight Lighting
Vapor tight fixtures live where standard lighting fails: food processing lines, cold storage, parking garages, car washes, tunnels, wastewater plants, and manufacturing floors. In those spaces the enemy is rarely the LED. It’s what gets past the gasket. Moisture that reaches the driver causes corrosion, flicker, and premature failure. Dust that settles inside traps heat and shortens fixture life.
Choosing correctly means matching the number to real exposure, not buying the highest one available. IP65 covers rain, mist, and routine housing. IP66 is the benchmark of industrial washdown. IP67 and IP68 address standing water and submersion, though neither is automatically better for a ceiling-hung fixture facing a pressure washer.
Use the chart below to match your environment to the right rating
Match the Rating to the Room
| Environment | Typical rating | What drives it |
|---|---|---|
| Warehouse, logistics, general manufacturing | IP65 | Airborne dust, occasional hosing |
| Parking garages, covered exteriors | IP65 | Wind-driven rain, road grime |
| Cold Storage | IP65 to IP66 | Condensation cycling, defrost spray |
| Agricultural and livestock | IP66 | Pressure washing, ammonia, dust |
| Healthcare and sterile processing | IP65 minimum | Frequent surface disinfection |
| Car wash, food processing, dairy | IP66 to IP69 | Sustained high-pressure washdown |
Need an IP Rated Fixture?
