When choosing lighting for your home, style, brightness and colour temperature are often the first things you consider. However, if the light will be installed in a bathroom, garden, patio, exterior wall or another area exposed to moisture or dust, the IP rating becomes extremely important.

IP stands for Ingress Protection. It is a standardised rating system that indicates how well an electrical enclosure is protected against solid objects, dust and water.

Understanding IP ratings can help you select lighting that is more appropriate for its intended environment. A beautiful indoor wall light may work perfectly in a living room but may not be suitable for an exposed outdoor wall. Similarly, bathroom lighting may require different protection depending on how close it is to showers or baths.

This guide explains how IP ratings work and what to consider when choosing lighting for different areas of your home.

What Does an IP Rating Mean?

An IP rating usually consists of the letters IP followed by two numbers.

For example:

IP65

The first number indicates protection against solid objects and dust.

The second number indicates protection against water.

In general, higher numbers represent greater levels of protection within each category.

However, a higher IP rating is not automatically necessary for every location.

The important thing is choosing a fixture that is suitable for the environment where it will actually be installed.

Understanding the First IP Digit

The first digit indicates protection against solid objects.

The scale generally runs from 0 to 6.

IP0X

No specified protection against solid objects.

IP1X

Protection against larger objects.

IP2X

Protection against objects such as fingers.

IP3X

Protection against smaller tools or objects.

IP4X

Protection against small solid objects.

IP5X

Dust-protected, although some limited dust entry may still be possible.

IP6X

Dust-tight protection.

Outdoor and garden lighting often uses higher solid-protection ratings because fixtures may be exposed to dirt, dust and other environmental conditions.

Understanding the Second IP Digit

The second digit relates to protection against water.

This is particularly important for exterior lighting, bathrooms and landscape fixtures.

Common classifications include:

IPX0

No specified water protection.

IPX1

Protection against vertically falling water drops.

IPX2

Protection against dripping water at limited angles.

IPX3

Protection against spraying water.

IPX4

Protection against splashing water.

IPX5

Protection against water jets.

IPX6

Protection against stronger water jets.

IPX7

Protection under specified temporary immersion conditions.

IPX8

Protection for specified continuous immersion applications.

The exact suitability still depends on the manufacturer's specifications and the installation environment.

What Does IP20 Mean?

IP20 is commonly seen on indoor lighting products intended for dry interior spaces.

It may be appropriate for areas such as:

• Living rooms

• Bedrooms

• Dining rooms

• Dry hallways

• Home offices

Because an IP20 fitting does not provide meaningful water protection, it generally should not be treated as suitable for exposed outdoor areas or moisture-prone locations simply because the design looks appropriate.

Always check the intended application.

What Does IP44 Mean?

IP44 indicates protection from relatively small solid objects and splashing water.

This rating is often found on certain bathroom or sheltered exterior fixtures.

Possible applications may include:

• Covered patios

• Sheltered entrances

• Certain bathroom locations

• Protected exterior walls

However, an IP44 rating does not automatically make a fixture suitable for every bathroom or outdoor position.

A light underneath a deep verandah experiences much less weather exposure than one mounted on an uncovered garden wall.

What Does IP54 Mean?

IP54 provides stronger protection against dust and splashing water than many basic indoor fittings.

It can be useful for selected sheltered outdoor or utility applications.

You may see IP54 used for:

• Exterior wall lights

• Covered outdoor areas

• Garages

• Utility spaces

The product's installation instructions should always be checked because weather exposure varies significantly between locations.

What Does IP65 Mean?

IP65 is one of the most common ratings found on outdoor lighting.

The first digit indicates a high level of dust protection, while the second indicates protection against water jets.

IP65 fixtures are frequently used for:

• Exterior wall lights

• Garden spike lights

• Bollards

• Outdoor spotlights

• Architectural lighting

This makes IP65 a popular choice for exposed residential outdoor environments.

However, IP65 does not mean the fixture is designed for underwater installation.

Water-jet resistance and immersion protection are different categories.

What Do IP67 and IP68 Mean?

IP67 and IP68 provide higher levels of water protection than ratings typically used for basic exterior wall lighting.

These ratings may appear on lighting intended for more demanding environments.

They can be relevant around:

• Water features

• Ground-level landscape installations

• Areas subject to temporary water exposure

However, do not assume any IP67 or IP68 product can be installed anywhere underwater.

Always check the manufacturer's stated depth, duration and installation requirements where applicable.

IP Ratings for Bathroom Lighting

Bathrooms require more careful lighting selection because moisture levels vary throughout the room.

A ceiling fixture far from a shower does not experience the same conditions as a fitting directly above or beside a wet area.

When selecting bathroom lighting, consider:

• Distance from bath or shower

• Possibility of water splashes

• Steam and humidity

• Product recommendations

• Applicable electrical installation requirements

Do not rely on one general rule for the entire bathroom.

The exact fixture location matters.

An appropriately licensed electrician can help determine which lighting is suitable for a particular bathroom position.

IP Ratings for Exterior Wall Lights

Exterior wall lights can face rain, dust, humidity and changing temperatures.

Before choosing a fixture, determine how exposed it will be.

Ask:

• Is it underneath an eave?

• Is it inside a covered porch?

• Is it exposed directly to rain?

• Is it close to garden sprinklers?

• Is the home near the coast?

A sheltered entrance may have different requirements from an uncovered garden wall.

Choose outdoor fixtures designed for the level of exposure they will actually receive.

IP Ratings for Garden Lights

Garden lighting is exposed to some of the most demanding residential conditions.

Fixtures may encounter:

• Rain

• Soil

• Irrigation

• Dust

• Lawn maintenance

• Humidity

Garden spike lights, bollards and pathway lights should therefore be specifically designed for exterior use.

Also remember that the fitting itself is only part of the installation.

Connections, drivers and other electrical components also need to be installed appropriately for outdoor conditions.

IP Ratings for Patios and Alfresco Areas

Covered outdoor entertaining areas may not experience direct rain, but they can still encounter moisture, humidity and wind-driven water.

Popular lighting options include:

• Wall lights

• Ceiling lights

• Downlights

• Pendant lights

Choose fixtures specifically approved for their intended outdoor environment.

Do not assume that being under a roof automatically makes an indoor fitting suitable.

The degree of protection provided by the structure should be considered alongside the product specifications.

Higher IP Is Not Always Better

It is easy to assume that choosing the highest possible IP rating is always best.

That is not necessarily true.

A bedroom pendant does not need the same environmental protection as a garden spotlight.

Instead, focus on matching the product to the installation.

You should also consider:

• Brightness

• Colour temperature

• Beam angle

• Dimming

• Fixture material

• Finish

• Energy efficiency

The best lighting product is one that balances performance, protection and design.

IP Rating vs IC Rating

IP ratings are sometimes confused with IC ratings.

They describe completely different things.

IP Rating: Protection against solid and water ingress.

IC Rating: Relates to insulation contact for recessed lighting.

For example, a bathroom downlight may require a suitable IP rating because of moisture while also needing an appropriate IC classification because ceiling insulation is installed above it.

One rating does not replace the other.

IP Rating vs Fire Rating

A fire-rated lighting solution addresses different building requirements from an IP rating.

An IP65 fitting may provide strong dust and water protection, but that does not automatically make it suitable for a fire-resisting ceiling system.

If several different ratings apply to your project, evaluate each requirement separately.

Common IP Rating Mistakes

Avoid these common mistakes:

• Using indoor lights outside

• Assuming all outdoor lights have the same protection

• Choosing only by appearance

• Treating IP44 and IP65 as identical

• Assuming IP65 means waterproof underwater

• Ignoring bathroom installation location

• Forgetting outdoor electrical connections

• Confusing IP with IC ratings

• Assuming the highest IP rating is always required

Checking product specifications before installation can prevent many of these problems.

IP Rating Buying Checklist

Before purchasing a light, consider:

• Indoor or outdoor location

• Dust exposure

• Rain exposure

• Splashing water

• Bathroom position

• Sheltered or exposed installation

• Garden irrigation

• Coastal conditions

• Manufacturer recommendations

Then compare the fixture's brightness, colour temperature, beam angle and design.

For fixed electrical installations, use appropriately qualified professionals where required.

Final Thoughts

Understanding IP ratings makes it much easier to choose lighting for different environments.

The first IP digit describes protection against solid objects and dust, while the second relates to water protection.

Dry indoor rooms generally require less environmental protection, while bathrooms, exterior walls and gardens demand greater consideration.

Rather than simply selecting the highest IP number available, choose a fitting designed for the actual conditions it will experience.

Always check the product specifications, especially when lighting is installed near water or in fully exposed outdoor locations.

With the correct IP rating and professional installation, lighting can remain practical, reliable and visually attractive throughout your home.

Explore indoor and outdoor lighting at Liteshine to discover wall lights, downlights, garden lights, bollards and exterior lighting solutions for contemporary Australian homes.