How to Light Your Bathroom: IP Zones, Layers & Style Guide

Why Bathroom Lighting Deserves More Thought Than Any Other Room

Verthara believes the bathroom is the most under-lit room in the average UK home. A single ceiling bulb and perhaps a shaving light is the standard setup in most British bathrooms — functional, yes, but far from ideal. Good bathroom lighting needs to handle everything from a brisk morning routine to a relaxing evening soak, all while meeting strict UK electrical safety regulations.

In this guide, we cover the regulatory framework (IP zones and BS 7671), the three layers of bathroom lighting, practical style advice, and product recommendations from the Verthara collection. For a deeper dive into the electrical regulations, visit our dedicated BS 7671 Bathroom Lighting Guide.

Understanding Bathroom IP Zones

The UK’s wiring regulations (BS 7671, 18th Edition) divide the bathroom into zones that dictate the minimum IP (Ingress Protection) rating a light fitting must carry. Getting this right is not optional — it is a legal requirement.

Zone 0 — Inside the Bath or Shower

This is the interior of the bath tub or shower tray itself. Any fitting installed here must be rated at least IPX7 (protected against immersion in water up to 1m for 30 minutes) and operate at a maximum of 12V SELV (Safety Extra-Low Voltage). In practice, very few lights are installed in Zone 0.

Zone 1 — Above the Bath or Shower

Zone 1 extends from the finished floor level to 2.25m above the floor, directly above the bath or shower tray. Fittings here must be rated at least IP44 (protected against splashing water from any direction). If water jets are used for cleaning (e.g. in a wet room), IP65 is required. Fittings must be suitable for at least 12V SELV, though mains-voltage fittings rated IP44 or above are also acceptable when connected to an RCD-protected circuit.

Zone 2 — Around the Bath or Shower

Zone 2 extends 60cm horizontally from the edge of Zone 1. The minimum IP rating here is also IP44. This zone typically covers the area around vanity mirrors and basins near the bath.

Outside the Zones

Anywhere beyond Zone 2 can use standard indoor fittings (no IP rating required). However, we recommend using at least IP44-rated fittings throughout the bathroom for peace of mind, as steam and condensation affect the entire room.

Important: Always have bathroom electrical work carried out by a qualified, Part P registered electrician. For full regulatory detail, see our BS 7671 Bathroom Lighting Guide.

The Three Layers of Bathroom Lighting

Layer 1: Ambient (General) Lighting

The foundation of your bathroom lighting scheme. A flush-mounted ceiling light or a set of recessed downlights provides overall brightness for the room. In a standard bathroom (4–8m²), aim for at least 300 lumens per square metre. A single flush light with 2,000+ lumens covers a small bathroom; larger spaces benefit from three to six recessed downlights spaced evenly across the ceiling.

Layer 2: Task Lighting (Vanity / Mirror)

Task lighting is essential for shaving, applying make-up, and skincare routines. The best position is flanking the mirror with two wall lights (one each side) at roughly face height. This eliminates shadows under the chin and nose that a single overhead light creates. If space does not allow two side lights, a horizontal LED strip or light bar above the mirror is the next best option.

Choose bulbs or integrated LEDs with a CRI (Colour Rendering Index) of 90 or above and a colour temperature of 3,000–4,000K for accurate skin tones.

Layer 3: Accent & Mood Lighting

Accent lighting transforms a bathroom from purely functional to spa-like. Options include:

• LED strip lighting under a freestanding bath or floating vanity unit for a soft, ambient underglow.
• A recessed niche light inside a tiled shower recess.
• A small pendant light (IP44-rated, positioned outside Zone 1) for a decorative focal point.
• Dimmable downlights that can be dialled down for a relaxing evening bath.

Choosing the Right Fittings: IP44 vs IP65

The two IP ratings you will encounter most often in bathroom lighting are:

• IP44 — Protected against solid objects >1mm and water splashes from any direction. Suitable for Zones 1 and 2 in most domestic bathrooms.
• IP65 — Protected against dust ingress (totally dust-tight) and low-pressure water jets from any direction. Required in wet rooms, walk-in showers, and any bathroom where high-pressure cleaning may occur. Also ideal for outdoor lighting.

When in doubt, opt for the higher rating. An IP65 fitting works everywhere an IP44 fitting does, plus more demanding environments.

Recommended from the Verthara Collection

Browse the full range at Verthara Bathroom Lighting and IP44 Bathroom Lights.

Style Inspiration for UK Bathrooms

Contemporary & Minimal

Chrome or brushed nickel wall lights flanking a frameless mirror, paired with recessed downlights in the ceiling. Keep lines clean and hardware matching for a cohesive look.

Hotel-Luxe

A backlit mirror (with integrated LED) for a glamorous, Hollywood-vanity glow. Add dimmable downlights and a decorative pendant in the centre of the room for maximum impact.

Traditional & Period

Brass or aged bronze wall lights with glass shades suit Victorian and Edwardian bathrooms. Choose warm-toned finishes that complement tiles, brassware, and freestanding baths.

Spa-Inspired

Warm LED strips concealed behind floating shelves and under the vanity unit, dimmable downlights on the lowest setting, and natural materials like wood and stone. The goal is soft, indirect light with no visible glare.

Electrical Safety Checklist

• All bathroom circuits should be RCD-protected (30mA).
• Use a qualified, Part P registered electrician for any new installations or modifications.
• Ensure all fittings carry the correct IP rating for their zone.
• Double-check the maximum wattage on each fitting and never exceed it.
• All Verthara bathroom lights carry CE certification and include a 3-year manufacturer warranty.

Frequently Asked Questions

What IP rating do I need for bathroom lights?

Zone 0 (inside the bath/shower) requires at least IPX7. Zone 1 (directly above the bath/shower to 2.25m) requires at least IP44 (or IP45 if a jet spray is possible). Zone 2 (extending 60cm from Zone 1) also requires IP44 minimum. Outside these zones, standard indoor fittings can be used, though IP44 is still recommended for safety.

Can I install bathroom lights myself in the UK?

Minor bathroom lighting changes (like swapping a like-for-like fitting) can technically be done by a competent person. However, any new circuit work or changes in a bathroom “special location” should be carried out by a qualified, Part P registered electrician in accordance with BS 7671. We always recommend using a professional.

What colour temperature is best for a bathroom?

A neutral white of 3,000–4,000K is ideal for bathrooms. It provides clear, accurate light for grooming and applying make-up without the clinical feel of cool white (5,000K+). For a spa-like evening ambience, consider dimmable fixtures that can drop to a warmer 2,700K.

How many lights do I need in my bathroom?

As a rough guide: one ceiling light plus vanity lighting (wall lights or a mirror light) covers most bathrooms up to about 8m². Larger bathrooms benefit from additional recessed downlights and possibly an accent light for a freestanding bath. Aim for at least 300 lumens per square metre.

Are LED lights safe in bathrooms?

LED lights are the safest choice for bathrooms. They run cool, use low voltage in many fittings, and are available in all the required IP ratings. They also resist the moisture and temperature fluctuations common in bathrooms far better than halogen or incandescent options.