Understanding IP Ratings: A Complete Guide to Ensuring the Right Lighting for Every Environment
The quiet spec
that saves your lights.
Design and brightness get the attention. But the two-digit code on the back of every fixture — the IP rating — decides whether your lights survive their environment, or fail in a year.
A code, decoded.
IP stands for Ingress Protection — a standard that measures how well a fixture resists two specific threats. The first digit, from 0 to 6, grades protection against solid objects: dust, debris, fingers, tools. The second, from 0 to 8, grades protection against water: from light condensation up to full submersion.
That's the entire system. Two digits, two threats, and the difference between a fixture that lasts a decade and one that corrodes through its first winter.
Match the rating to the room.
The right rating depends on one question: what will the fixture actually be exposed to? Here are the five environments that cover most installations.
- Zone 1 — inside the shower or above the bath: IP65 minimum.
- Zone 2 — within 0.6 m of water: IP44 for splashes and steam.
- Zone 3 — the rest of the room: IP20 is generally sufficient.
- Under-cabinet — IP44 strips handle splashes and grease near the counter.
- Over stove or sink — IP44 for steam and condensation.
- General overhead — IP20 is fine away from water sources.
- Covered porch — IP44 is usually enough under cover.
- Exposed garden & paths — IP65 is the safe default.
- Sprinkler zones — IP67 for short-term submersion.
- Pools & fountains — IP68 for continuous submersion.
- Bedrooms, living rooms, hallways — dry indoor spaces don't need much protection. IP20 is standard.
- Anything more — adds cost without benefit.
- General warehouse lighting — IP65 covers dust and incidental water.
- Workshops with heavy dust or moisture — IP66 or higher.
- Car washes & food processing — IP67 to IP69 for high-pressure cleaning.
A high IP rating isn't
the same as outdoor-rated.
This is the single most common mistake buyers make. A waterproof IP rating means the fixture resists water — it doesn't mean the fixture is built to live outside.
- Corrosion resistance Especially critical in coastal areas where salt air degrades standard housings.
- Weatherproof drivers Transformers and connections must be rated for outdoor use, not just the housing.
- UV-stable finishes Direct sunlight cracks and fades coatings not designed for it.
Four myths worth retiring.
Higher is always better.
An IP68 fixture in your living room is overkill — it costs more and offers protection you'll never use. Match the rating to the environment, not the other way around.
IP ratings cover all hazards.
They only cover dust and water. They say nothing about impact resistance (look for IK ratings for that), heat tolerance, or electrical surges.
All outdoor lights need IP67+.
Most don't. IP65 handles standard rain, snow, and dust for typical residential outdoor lighting. IP67+ is reserved for submersion scenarios.
Indoor lights don't need IP ratings.
Bathrooms, kitchens, and laundry rooms all benefit from IP44 or higher. Steam and splashes are real threats, even indoors.
Protection that lasts.
A high IP rating extends a fixture's lifespan, but it doesn't make maintenance optional. Four habits keep the protection intact.
-
Clean regularly
Dust and grime accumulate on any fixture. Wipe down with a soft cloth; for outdoor lights, rinse off mud and debris after storms.
-
Inspect seals and gaskets
These parts actually keep water and dust out. If they're brittle, cracked, or loose, replace them promptly. They're the cheapest part of the fixture and the most consequential.
-
Watch for internal condensation
Moisture forming inside the housing usually means a seal has failed. Address it before corrosion sets in.
-
Use the right bulbs
Bulbs that run hot can warp seals in enclosed fixtures. LEDs emit less heat, last longer, and are the safer choice for any IP-rated installation.
Five questions before you buy.
Built for each environment.
Light that lasts
starts with the right spec.
Match the rating to the environment, don't confuse waterproof with outdoor-rated, and maintain the seals over time. Do that, and every fixture you install earns its keep for years.
Browse outdoor lighting
Laissez un commentaire