IP44 vs IP65 vs IP67: How to choose outdoor lighting fixtures

IP44 vs IP65 vs IP67: How to choose outdoor lighting fixtures

Because the "IP" rating determines whether the light fixture lasts one summer or several.

In outdoor lighting, the biggest purchasing mistake is choosing based on aesthetics and ignoring the IP rating . IP (Ingress Protection) is defined by the IEC 60529 standard and classifies the protection of the enclosure against dust and water.

In practice: if the light fixture is exposed to too much light and has a low IP rating, moisture/dust can get in → leading to malfunctions, corrosion, and LED/driver failures.

1) How to read an IP address (without complicating things)

The code has two digits :

  • 1st digit (solids/dusts) : protection against particles and contact.

  • 2nd digit (water) : protection against water (splashes, jets, immersion, etc.).

Example: IP65

  • “6” = high protection against dust

  • “5” = protection against water jets

2) IP44, IP65 and IP67: when to use (practical rule by zone)

IP44 — “protected” exterior

When it makes sense:

  • wall sconces under eaves/porch

  • enclosed or very sheltered balconies

  • areas without direct rainfall and without hose washing

What it protects against: splashes and basic contact, but it is not designed for intense and prolonged exposure to rain/spray.

IP65 — exposed exterior (the “safest” choice for Portugal)

When it makes sense:

  • Garden and facade exposed to rain.

  • path markers (irrigation zone)

  • LED wall projectors

  • Lighting fixtures near pools/washing areas (not submersible)

Why: IP65 is associated with good resistance to dust and sprayed water/jets, usually being sufficient for "heavy rain + irrigation".

IP67 — areas where temporary immersion is possible

When it makes sense:

  • recessed ground lighting fixtures in areas where water may accumulate.

  • locations with a real risk of flooding/short-term immersion

IP67 is often associated with resistance to dust and temporary immersion (depending on the manufacturer's conditions).

Tip: For most gardens/terraces in Portugal, IP65 is the "sweet spot" . IP67 is for specific cases (embedded in the ground, water accumulation).

3) And what about IK? (impact/vandalism)

For pathways, entrances, and passageways, IP rating is not sufficient. That's where IK rating comes in, indicating resistance to mechanical impacts, in line with IEC 62262 .

When you think about higher IK:

  • markers along paths (kicks, bicycles, balls)

  • lighting near gates/garages

  • public areas/condominiums

4) Correct IP rating + good lighting: how to avoid glare and light pollution

The APA defines light pollution as light emanating from the area intended for illumination, typical of poorly designed lighting or inadequate luminaires.

To have "beautiful" and functional lighting:

  • Choose light fixtures that are directed downwards (less intrusive on windows).

  • Use multiple moderate spotlights instead of one overly powerful projector.

  • Invest in sensors/timers when using security lighting.

5) External electrical safety (short circuit and essential)

Outdoors, humidity + electricity = risk. Technical regulations (RTIEBT) refer to protection by differential devices ≤ 30 mA in various applications, including circuits that require greater protection.

Practical rules:

  • Avoid permanent extensions abroad.

  • Use connectors/enclosures suitable for outdoor use (IP compliant).

  • If it's a fixed installation, hire an electrician (buried cable, connections, protection).

Purchase checklist (IP/IK)

  • Is the light fixture exposed to direct rain ? → point to IP65

  • Is it embedded in the ground/risk of water accumulation? → consider IP67

  • Is it a passage/impact zone? → check IK (IEC 62262)

  • Will you be using a hose/jet irrigation system? → IP65 rating preferred.

  • Is there a risk of glare for neighbors/windows? → light fixture directed downwards

FAQ

Is IP44 sufficient for outdoor use?
For well-protected outdoor use only (porch/protected wall). For direct rain and irrigation, IP65 is usually safer.

Is IP67 better than IP65?
It is "more" in some scenarios (temporary immersion), but it may be unnecessary and more expensive if the light fixture is not in an area with accumulated water.

What is IK?
Index of resistance to mechanical impacts, aligned with IEC 62262.