Can pendant lights be hung over a bathtub?

UK wiring regulations (BS 7671) divide bathrooms into zones that dictate which light fittings are safe to use where. Zone 0 is inside the bath or shower itself — no pendant is ever appropriate here. Zone 1 covers the area directly above the bath up to 2.25 metres from the floor. Zone 2 extends 0.6 metres beyond the edge of the bath horizontally.

For a pendant to hang over a bathtub, it must sit within Zone 1 or Zone 2 depending on its height and position. Zone 1 requires a minimum IP45 rating; Zone 2 requires IP44. Most decorative pendant lights are not rated for either zone by default, so you must specifically seek out bathroom-rated pendants rather than adapting a standard fitting.

The zone boundaries matter because water vapour and splashing are real risks even at ceiling height. Steam rises and condenses on surfaces well above head height, which is why the regulations extend to 2.25 metres vertically. Choosing a fitting that ignores these boundaries is not only a fire and electrocution risk — it will also invalidate your home insurance if a claim arises from a bathroom electrical fault.

IP ratings describe how well a fitting resists solid particles and water ingress. The two digits indicate protection against solids (first digit) and liquids (second digit). For bathroom pendants, the liquid protection digit is what matters most.

• IP44: protected against water splashing from any direction — the minimum for Zone 2
• IP45: protected against low-pressure water jets — required for Zone 1 directly above the bath
• IP65: fully dust-tight and jet-proof — a comfortable margin of safety for Zone 1

In practice, many bathroom pendant manufacturers rate their fittings to IP44 or IP65, with IP44 being the most common for decorative styles. If you are positioning the pendant directly above the bath at a height below 2.25 metres, opt for IP65 to give yourself a clear safety margin. Check the manufacturer's datasheet rather than relying on product descriptions alone — the IP code should appear on the fitting itself or on the packaging.

The NICEIC guidance on kitchen and bathroom electrics confirms that all bathroom electrical work must comply with Part P of the Building Regulations, which means notifiable work must be carried out or certified by a registered electrician.

Height is the most practical lever you have when planning a pendant over a bath. If the bottom of the fitting sits at or above 2.25 metres from the finished floor level, it falls outside Zone 1 and into Zone 2, where IP44 is sufficient. This opens up a wider range of bathroom-rated fittings.

For a standard UK ceiling height of 2.4 metres, this leaves only 15 centimetres of drop from the ceiling rose to the base of the fitting — enough for a compact pendant with a short cord, but not for a dramatic hanging style. In rooms with higher ceilings (2.6 metres or more), you have more flexibility to use a longer cord while still clearing the 2.25-metre threshold.

Measure from the finished floor, not from the top of the bath. A freestanding bath on legs can raise the rim by 50–60 centimetres, but the zone measurement always starts at floor level. Do not adjust the calculation based on bath height.

If your ceiling is lower than 2.4 metres, a pendant over the bath is unlikely to be practical without breaching Zone 1, at which point IP45 or IP65 becomes mandatory and your fitting options narrow considerably. In those rooms, a flush or semi-flush bathroom-rated ceiling fitting is usually the safer and more proportionate choice.

Under UK regulations, all circuits supplying bathrooms must be protected by a residual current device (RCD). This is not optional — it is a requirement of BS 7671 and Part P of the Building Regulations. An RCD detects imbalances in current that indicate electricity is flowing through an unintended path (such as a person) and cuts the supply within milliseconds.

You do not need a completely separate circuit just for the bathroom pendant, but the circuit it sits on must have RCD protection. Most modern consumer units (fuse boards) installed after 2008 include RCD protection across all circuits as standard. If your home has an older board, a qualified electrician will assess whether the bathroom circuit is adequately protected and may recommend an upgrade.

Switches and socket outlets are not permitted inside a bathroom (except shaver sockets to BS EN 61558-2-5). The pendant must therefore be controlled by a pull-cord switch inside the bathroom or a standard switch positioned outside the room. This is worth factoring into your installation plan before committing to a fitting position.

For broader context on managing energy use and electrical controls in the home, the Energy Saving Trust's advice on heating controls is a useful reference for understanding how different circuits and controls interact across a property.

Style and compliance can coexist, but the range of bathroom-rated pendants is narrower than the general pendant market. The most practical shapes are those with fully enclosed light sources and smooth, non-porous surfaces that resist moisture and are straightforward to wipe down.

• Globe pendants in opal or clear glass: clean lines, widely available in IP44-rated versions, suit contemporary and classic bathrooms equally
• Dome or bell shades in ceramic or porcelain: inherently moisture-tolerant materials, tend to direct light downward for a focused effect
• Cylinder pendants in brushed brass or chrome: popular in spa-style bathrooms, look for sealed versions with rated cords

Avoid open-bottomed pendants with fabric shades, exposed Edison bulbs without enclosures, or multi-arm chandeliers where the wiring is exposed — these are rarely available with adequate IP ratings and are difficult to keep clean in a steamy environment.

Colour temperature also matters in a bathroom. A warm white (2700–3000K) creates a relaxing atmosphere for bathing, while a neutral white (3500–4000K) is better for grooming tasks. If the pendant is the sole light source over the bath, consider whether its output is sufficient or whether it supplements other ceiling or wall lighting in the room.