The IP rating (Ingress Protection) is a global standard that shows how well a lighting device is protected against solids and dust and water. It consists of the letters IP followed by two digits: the first for dust resistance, the second for water resistance.
Quick answer: In IPXY, X indicates protection from solids/dust (0–6) and Y indicates protection from water (0–8/9). The higher the numbers, the greater the protection.
What does each digit in IP mean?
First digit: protection from solids and dust (0–6)
- 0: no protection.
- 4: protection from solids larger than 1 mm.
- 5: partial dust protection.
- 6: fully dust-tight.
Second digit: water protection (0–8/9)
- 0: no protection.
- 4: resists water splashes from all directions.
- 5: resists light water jets.
- 7: withstands temporary immersion up to about a meter.
- 8: withstands continuous immersion underwater.
Common protection ratings
- IP20: dry indoor use only.
- IP44: resists light splashes, suitable for bathrooms (away from direct water).
- IP54: dust and splash protection for semi-exposed areas.
- IP65: dust-tight and water-jet resistant, ideal for outdoors.
- IP67/IP68: withstands immersion, for underwater or harsh uses.
Why does IP rating matter?
- It determines the fixture's suitability for the location (indoor/outdoor/wet).
- It protects against short circuits and corrosion.
- It extends the fixture's life and keeps it safe.
How to read the rating when buying
- Look for the IP code on the box or specs.
- Read the two digits: first for dust, second for water.
- Match the protection to the installation environment.
Frequently asked questions
What does IP65 mean?
Fully dust-tight (6) and water-jet resistant (5), suitable for outdoors.
Is the X in IPX4 a mistake?
No; it means that digit isn't specified for that category, with protection stated only for the other.
What's the minimum rating for a bathroom?
IP44 or higher is preferred near splash zones.
Conclusion
The IP rating is the key to choosing safe, suitable lighting for every environment; understand the two digits and match them to the installation location for long, safe performance.
Shop lighting fixtures in various IP ratings at Tirtk Lighting & Electrical
Related: IP rating matters for outdoor lighting like solar floodlights, street lights, and floodlights at Tirtk.