Bathroom lighting is the most technically constrained category of residential lighting — and the one most frequently done badly. The result of poor bathroom lighting is not just an unpleasant space; it actively makes tasks harder (shaving, applying make-up) and undermines the spa-like quality that a well-designed bathroom should create. This guide covers every decision.
The Three Layers of Bathroom Light
Like every other room, a bathroom benefits from layered lighting rather than a single source. The three essential layers:
Ambient light: The general illumination of the room. A ceiling flush mount or recessed downlights provide this. In a small bathroom, one well-placed IP-rated flush mount may be sufficient. In a larger bathroom, multiple downlights or a combination of ceiling fixture and wall sconces create even ambient fill. Browse ceiling lights for IP-rated options.
Task light: The most critical layer in a bathroom. Task light is specifically positioned to illuminate the face at the mirror without casting shadows from above. This is where most bathroom lighting fails — a single ceiling light produces top-shadow that is unflattering and unhelpful for grooming.
Accent light: Lighting that creates atmosphere rather than function. LED strips behind a floating vanity, a backlit mirror, a wall light at either side of a bath. This layer is what transforms a functional bathroom into a spa-like environment.
Mirror and Task Lighting
The gold standard for task lighting in a bathroom is a light source on either side of the mirror at face height, approximately 150–160 cm from the floor. This positions the light to illuminate the face evenly from both sides, eliminating the shadows produced by overhead-only lighting. Hollywood-style lighting (a row of exposed bulbs around the mirror frame) achieves the same effect at the cost of a more theatrical aesthetic.
A backlit mirror — with light emanating from behind the mirror rather than in front of it — is an increasingly popular solution that combines task lighting and ambient fill in a single unit. The light wraps around the face from multiple directions simultaneously.
Wall-mounted wall lights placed at either side of a bathroom mirror, at face height, are the most architecturally refined solution. Browse the wall lights collection for IP44-rated options suitable for bathroom use. See our wall lights guide.
IP Ratings Explained
IP (Ingress Protection) ratings define how resistant a light fitting is to moisture. In bathrooms, the rating required depends on the zone in which the fitting is installed:
- Zone 0 (inside the bath or shower): IP67 minimum (complete submersion protection)
- Zone 1 (directly above the bath/shower up to 2.25m): IP44 minimum (splash-proof from all directions)
- Zone 2 (60 cm outside the bath/shower): IP44 recommended
- Outside zones (over 60 cm from water sources): standard fittings may be used but IP44 is generally best practice in any bathroom
As a practical rule: fit IP44 or better for all bathroom ceiling and wall lights regardless of zone. The small additional cost is worth the safety margin.
Colour Temperature for Bathrooms
Bathrooms require a balance between warmth (for ambiance and flattering skin rendering) and clarity (for grooming accuracy). The recommended colour temperature is 3000K for general and ambient bathroom lighting — warmer and more flattering than the 4000K found in commercial bathrooms, but slightly crisper than the 2700K used in bedrooms and living rooms.
For mirror task lighting specifically, 3000K with a high CRI (90+) ensures accurate colour rendering for make-up application and grooming. A low-CRI bulb in bathroom mirror lighting produces a dull, muddy light that makes accurate grooming genuinely difficult. See the full colour temperature guide.
Common Bathroom Lighting Mistakes
- Single ceiling downlight over the mirror: Creates top-shadow on the face. Always supplement with side task lighting.
- Cool white (4000K+) throughout: Creates a clinical atmosphere. Use 3000K for a spa-like quality.
- No dimmer on the ambient light: A bathroom without a dimmer cannot create atmosphere for a bath. Install dimmers on all ambient circuits.
- No IP rating consideration: The most dangerous mistake. Always check IP ratings against bathroom zones.
- Under-sized fittings: A small fitting in a large bathroom provides insufficient light and looks architecturally incorrect.
Pair beautiful bathroom lighting with considered bathroom décor accessories — trays, candle holders, diffusers — for the complete spa experience. See the luxury bathroom décor guide.
Frequently Asked Questions
- What is the best lighting for a bathroom mirror?
- Wall lights at either side of the mirror at face height (150–160 cm from floor), or a backlit mirror. This eliminates top-shadow from ceiling-only light. Use 3000K with CRI 90+. Browse wall lights.
- What IP rating do I need for bathroom lights?
- IP44 as a minimum for all bathroom lights. Zone 1 (above the bath or shower) requires IP44; Zone 0 (inside the shower) requires IP67. Use IP44+ throughout the bathroom as best practice.
- What colour temperature is best for a bathroom?
- 3000K — warm enough for atmosphere, clear enough for grooming. Always CRI 90+ for mirror task lighting. See the full colour temperature guide.
