IP Ratings Explained: A Simple Guide to Bathroom and Outdoor Lighting

IP Ratings Explained: A Guide to Bathroom and Outdoor Lighting

Choosing a new light fitting is usually about finding something that looks right for your home. But when that light is going in a bathroom or outside, there’s another detail you need to consider: its IP rating.

You’ve probably seen markings such as IP44, IP54 or IP65 on lighting products. They might look like technical jargon, but they tell you how well a fitting is protected against dust, solid objects and water.

At Luminosity Designs, we believe choosing lighting should be about more than just appearance. Getting the technical details right helps you choose a fitting that’s suitable for its intended location.

In this guide, we’ll explain what IP ratings mean, which ratings are commonly used for bathroom and outdoor lighting, and what you need to consider before buying.

What is an IP rating?

IP stands for Ingress Protection. It describes how well an electrical enclosure protects against the entry of solid objects and water under specified test conditions.

An IP rating usually consists of two digits:

• The first digit indicates protection against access to hazardous parts and the entry of solid objects, including dust.
• The second digit indicates protection against water.

For example, IP44 provides protection against solid objects of 1mm or larger and splashing water. IP65 is dust-tight and protects against water jets under specified test conditions.

A higher rating isn’t automatically better for every situation. The right choice depends on where the light will be installed and the manufacturer’s instructions.

What do common IP ratings mean?

Here are some of the ratings you’ll commonly encounter when shopping for bathroom and outdoor lights.

These descriptions are simplified explanations of the relevant protection classes. An IP rating doesn’t guarantee that a fitting can withstand every possible exposure to water.

For example, IP67 doesn’t automatically mean a light is suitable for permanent underwater use. Always check the manufacturer’s instructions.

What IP rating do I need for outdoor lights?

The right IP rating depends on how exposed the fitting will be to rain, moisture and other environmental conditions.

A light beneath a sheltered porch faces different conditions from one mounted on an exposed garden wall or recessed into the ground.

IP44 outdoor lights

IP44 is a common rating for domestic exterior wall lights. It protects against splashing water and solid objects of 1mm or larger.

It may be suitable for a front door light or other exterior fitting where the manufacturer approves the intended installation.

However, IP44 isn’t a universal requirement or guarantee of suitability for every outdoor location.

IP54 outdoor lights

IP54 provides protection against dust ingress, although dust can still enter in limited quantities, and protection against splashing water.

It may be useful where fittings are exposed to both dust and moisture, provided the product is suitable for the location.

IP65 outdoor lights

IP65 provides a dust-tight enclosure and protection against water jets.

It can be a suitable choice for many exposed outdoor applications, depending on the manufacturer’s specification.

You don’t necessarily need IP65 for every garden light. The important thing is choosing a fitting designed for the conditions it will experience.

IP67 outdoor lights

IP67 provides dust-tight protection and protection against temporary immersion under specified test conditions.

This can be relevant for some recessed ground lights, but the rating alone doesn’t establish suitability for every installation.

If you’re installing lights in a patio or driveway, check the product’s loading limits, drainage requirements and installation instructions. A fitting designed for a garden path isn’t necessarily suitable for vehicles to drive over.

Explore our exterior wall lighting collection and exterior recessed lighting collection to find fittings for different outdoor applications.

For more advice on positioning and choosing exterior lights, read our Outdoor Lighting Guide. We’ll add a link here once that article is published.

Bathroom lighting IP ratings explained

Bathrooms need particular care because water and electricity can present a serious risk if equipment is incorrectly selected or installed.

In the UK, Section 701 of BS 7671, the IET Wiring Regulations, covers electrical installations in locations containing a bath or shower.

These locations are divided into electrical zones. The zone where a light is installed affects the protection and equipment requirements.

Zone 0: inside the bath or shower

Zone 0 is the interior of a bath or shower basin.

Equipment installed here generally requires at least IPX7 protection against temporary immersion, alongside additional electrical requirements. Only equipment specifically suitable for this location should be installed.

An ordinary bathroom ceiling light isn’t suitable for this zone.

Zone 1: above the bath or shower

Zone 1 generally covers the area above the bath or shower up to 2.25 metres above the relevant finished floor level, within the defined zone boundaries.

At least IPX4 protection is generally required. Where water jets are likely, IPX5 protection is required.

The exact boundaries and permitted equipment depend on the bathroom layout and applicable wiring requirements.

Zone 2: around the bath or shower

Zone 2 generally extends 0.6 metres horizontally beyond Zone 1 and up to 2.25 metres above the relevant finished floor level.

At least IPX4 protection is generally required, rising to IPX5 where water jets are likely.

This can affect the choice of wall lights, illuminated mirrors and other electrical equipment installed near a bath or shower.

What about the rest of the bathroom?

Areas outside Zones 0, 1 and 2 don’t automatically require IPX4 simply because they’re in a bathroom.

However, the fitting still needs to be suitable for the conditions it will experience. Steam, condensation, splashing and the manufacturer’s instructions should all be considered.

Remember that bathroom zones aren’t the only consideration. Voltage, electrical protection, installation methods and restrictions specified by the manufacturer can also affect which fittings are suitable.

Can I use an IP44 light in a bathroom?

Sometimes, yes. IP44 fittings are commonly considered for bathroom lighting, but their suitability depends on the installation location.

IP44 provides protection against splashing water, making it a possible option for certain bathroom applications.

However, it isn’t suitable for Zone 0, where at least IPX7 protection is generally required. Other electrical requirements also apply within the bathroom zones.

Don’t assume a light is suitable simply because the packaging says IP44 or describes it as a bathroom light. Check the manufacturer’s instructions and the exact position where it will be installed.

Can I use an IP65 light in a bathroom?

IP65 provides protection against dust and water jets under specified test conditions.

It may be suitable for certain bathroom installations, including some shower-area applications, if the product is designed and approved for that location.

However, IP65 doesn’t automatically make a fitting suitable for Zone 0, where at least IPX7 protection against temporary immersion is required.

The complete electrical specification must also meet the requirements for the installation.

Are IP ratings the same as being waterproof?

Not exactly. IP ratings describe protection under specified test conditions rather than providing an unlimited guarantee against water ingress.

For example:

• IP44 protects against splashing water.
• IP65 protects against water jets.
• IP67 protects against temporary immersion under specified test conditions.

The installation matters, too. Damaged seals, incorrectly fitted cable entries or unsuitable mounting positions can compromise a fitting’s protection.

Always follow the manufacturer’s installation and maintenance instructions.

What are the current UK regulations for bathroom and outdoor lighting?

IP ratings describe product protection. They aren’t a complete set of electrical installation regulations.

In the UK, BS 7671, the IET Wiring Regulations, provides the recognised technical framework for electrical installation design, installation and verification. As of October 2026, the current edition is BS 7671:2018+A4:2026.

For bathroom installations, Section 701 covers the additional requirements for locations containing a bath or shower, including the electrical zones and equipment selection.

For outdoor installations, the requirements depend on the type of installation, environmental conditions, protection against electric shock and the suitability of the equipment and wiring.

In England and Wales, certain electrical work in dwellings is subject to Building Regulations Part P. Whether work is notifiable depends on the type of work and where it is carried out. Requirements differ across the UK.

Fixed electrical work should be undertaken and tested by a competent person with the appropriate knowledge and experience. Where you’re unsure about a fitting or installation, consult a suitably qualified electrician.

For the latest technical information, refer to the IET’s BS 7671 guidance.

What to check before buying bathroom or outdoor lights

Before ordering a fitting, check these five things:

1. Installation location: Will it be exposed to rain, splashing, water jets or possible immersion? Is it inside a bathroom electrical zone?
2. IP rating: Understand what the two digits mean and whether the rating meets the requirements for the location.
3. Manufacturer’s instructions: Confirm that the fitting is approved for the intended application.
4. Electrical requirements: Check the supply voltage, installation method and any additional restrictions.
5. Maintenance and installation: Consider access, drainage, seals and any requirements for safe installation.

Taking a few minutes to check these details can save a fair bit of hassle later on.

Frequently asked questions about IP ratings

What does IP44 mean on a light?

IP44 means protection against solid objects of 1mm or larger and splashing water under specified test conditions. It is commonly found on some bathroom and outdoor lights, but suitability depends on the installation location.

Is IP65 better than IP44?

IP65 offers greater dust protection and protection against water jets, whereas IP44 protects against splashing water and solid objects of 1mm or larger. The right choice depends on the application, not simply which number is higher.

What is the minimum IP rating for bathroom lights?

It depends on the bathroom zone. Zone 0 generally requires at least IPX7, while Zones 1 and 2 generally require at least IPX4, with IPX5 required where water jets are likely. Other electrical requirements apply.

Is IP44 enough for a front door light?

It can be suitable for many front door installations, provided the fitting is approved for the location and expected exposure.

Does IP67 mean a light can stay underwater?

No, not automatically. IP67 covers temporary immersion under specified test conditions. Permanent immersion requires a product specifically suitable for that application.

Can I use an ordinary ceiling light in a bathroom?

Potentially, in a suitable location outside the bathroom zones, provided the fitting is suitable for the environmental conditions and the manufacturer’s instructions permit its use.

Find the right lighting at Luminosity Designs

Whether you’re updating your bathroom or choosing lights for your garden, the right fitting needs to look the part and be suitable for its intended location.

At Luminosity Designs, we’re an independent, family-run lighting showroom in Driffield, East Yorkshire. We believe good lighting comes down to choosing the right product for the job, not just the one that looks best in a photograph.

Explore our exterior wall lights and exterior recessed lighting to start planning your outdoor lighting.

And if you’re working on a bathroom project, always check the full product specification before buying, particularly for fittings near a bath or shower.

Getting the details right at the start makes all the difference.