Bathroom Lighting and IP Ratings, Explained
Updated: Sep 3
Bathroom lighting has to balance two things: the light you want and the electrical safety the room requires. The key is to understand bathroom zones and IP ratings before choosing a fitting.
This guide explains the principles in plain English. It is intended to help you choose suitable decorative lighting, not to replace the judgement of a qualified electrician. The final location and installation of any bathroom fitting should be checked against the current edition of BS 7671, the manufacturer's instructions and the conditions in the room.
What does an IP rating mean?
IP stands for Ingress Protection. The two digits in an IP rating describe how well an enclosure protects against solid objects and water.
For bathroom lighting, the second digit is particularly important because it relates to water protection. For example, IP44 indicates protection against splashing water, while IP65 provides a higher level of water protection.
A higher IP number is not automatically necessary everywhere in a bathroom. The correct rating depends on where the fitting will be installed and how exposed that position is to water.
What are bathroom lighting zones?
BS 7671 treats a room containing a bath or shower as a special location. The areas closest to the bath or shower are divided into zones because the risk from water is greater there.
The exact boundaries depend on the arrangement of the bath, shower and room, so measurements should be confirmed by the installer.
Zone 0
Zone 0 is the area inside the bath or shower basin/tray.
This is the wettest part of the bathroom and requires equipment specifically suitable for that environment. The IET guidance identifies IPX7 protection for equipment in Zone 0.
Zone 1
Zone 1 is the area immediately above the bath or shower, subject to the dimensional limits set out in the Wiring Regulations.
The IET states that the minimum IP rating for equipment in Zones 1 and 2 is IPX4, or IPX5 where water jets are present.
That is an important distinction: an IP65 fitting is often chosen because it offers strong water protection, but it is not correct to say that every Zone 1 light must always be IP65.
Zone 2
Zone 2 extends beyond Zone 1 around the bath or shower. The IET guidance again gives a minimum of IPX4, or IPX5 where water jets are likely.
The precise extent of Zone 2 should be checked against the current regulations for the particular bathroom layout.
Does a wash basin create its own bathroom zone?
A wash basin by itself does not create a Zone 1 or Zone 2 in the same way that a bath or shower does.
That does not mean any fitting is automatically suitable beside a basin. Splashing, condensation, the manufacturer's instructions and the general environment still matter. A qualified electrician should confirm whether a fitting is appropriate for its proposed position.
Is IP65 better than IP44 in a bathroom?
IP65 gives a higher degree of water protection than IP44, but that does not mean every bathroom light needs to be IP65.
The better question is:
What level of protection is required in this particular position?
For areas close to showers or where water jets may be present, a higher rating can be appropriate. In other positions, an IP44 decorative fitting may be entirely suitable if it meets the requirements for that location.
Choosing solely by the biggest IP number can unnecessarily restrict your choice of decorative lighting.
Can I use a normal ceiling light in a bathroom?
Possibly, but only if its position is outside the regulated zones and the fitting is suitable for the environment and installed in accordance with the current regulations and manufacturer's instructions.
Do not assume that being outside a numbered zone makes every decorative fitting suitable. Bathrooms can still have condensation and moisture, and the electrical installation as a whole must be appropriate for the room.
Can I hang a pendant light in a bathroom?
A pendant can sometimes be used in a bathroom, but its suitability depends on its position, drop, IP rating, construction and the manufacturer's instructions.
A decorative pendant placed well away from the bath or shower may be possible in some rooms; a fitting hanging into a regulated zone needs to meet the requirements for that zone.
This is a good example of why ceiling height and the final drop matter as much as the product photograph.
What IP rating do I need above a shower?
The answer depends on the exact position and the way water can reach it.
The IET states that equipment in Zones 1 and 2 requires at least IPX4, increasing to IPX5 where water jets are present. Many products sold specifically for shower areas carry ratings such as IP65, but the correct choice should be confirmed for the particular installation.
How should I light a bathroom mirror?
Bathroom lighting is not only about IP ratings. The mirror is where poor lighting is noticed most.
A single bright ceiling light directly overhead can create shadows around the eyes and under the chin. Where the bathroom layout and electrical requirements allow, lighting positioned closer to face height or on either side of the mirror can give a more even result for shaving, make-up and everyday use.
If accurate skin tones matter, also consider the colour rendering of the lamp or integrated LED rather than judging the fitting only by wattage.
What colour temperature is best for a bathroom?
There is no single compulsory colour temperature for a bathroom.
3000K is a useful choice for many homes because it feels cleaner than very warm light while remaining comfortable. 4000K gives a cooler, crisper appearance and can suit task-focused mirror lighting or a deliberately contemporary scheme.
The most important point is consistency. If the mirror light, ceiling light and any other sources are visible together, noticeably different colour temperatures can make the room feel mismatched.
For a fuller explanation, see our guide to 2700K, 3000K and 4000K colour temperature.
Should bathroom lighting be layered?
Yes. A bathroom often works better with more than one source of light.
A practical scheme can include:
general light for safe, even illumination;
mirror or task light for grooming;
softer decorative light where the location and regulations allow it.
This gives you a bathroom that works in the morning without feeling harsh when you want a calmer atmosphere later in the day.
What should I check before buying a bathroom light?
Before choosing the fitting, note:
where the bath or shower sits;
the proposed position of the light;
the ceiling height and intended drop;
the product's IP rating;
whether the manufacturer approves it for that use;
whether it is dimmable if you want dimming;
the colour temperature and light output;
whether your electrician is happy with the proposed position.
That is more reliable than choosing a product simply because its title contains the word “bathroom”.
Our showroom view
Bathroom lights are a good example of why the specification and the appearance need to be considered together. A fitting may be technically suitable but too bright, too cool or visually wrong for the room; another may look ideal online but not be suitable for the intended position.
At Illuminations of Camberley we can help you compare decorative bathroom lighting and understand the product specifications before you buy. For the final electrical decision and installation, use a qualified electrician who can assess the actual room. If you would like help comparing suitable fittings, use our free showroom lighting-planning service.
Official electrical guidance
For current UK electrical requirements, refer to the Institution of Engineering and Technology (IET) and the current edition of BS 7671, Requirements for Electrical Installations.
The IET's technical FAQ states that equipment installed in bathroom Zones 1 and 2 requires a minimum of IPX4, or IPX5 where water jets are present:
The IET also provides current information on BS 7671 editions and amendments:
Technical content reviewed August 2026. Electrical regulations and product instructions can change, so final suitability should always be confirmed for the specific installation.
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Review and primary sources
Reviewed by Illuminations of Camberley on 21 August 2026. This guide combines practical experience from displaying and advising on decorative lighting with the primary guidance below. Product specifications and electrical requirements should always be checked for the individual fitting and installation.
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