A light above a bathroom mirror should normally feel related to the mirror's width without extending awkwardly beyond it. A narrower fitting leaves useful visual breathing room, while a light that is too small can look lost and give uneven coverage. The right choice also depends on shade size, the basin below and the available wall space.

Measure the mirror and the wall around it

Record the mirror width first, then measure the clear wall above it. Include nearby cabinets, shelves, sloping ceilings and door openings. The fitting should look centred on the mirror or basin arrangement, but the electrical point may not be perfectly aligned, so ask an electrician what can be adjusted before ordering.

In my view, proportion is easier to judge with a paper template than with numbers alone. Mark the fitting's full width and projection on paper, tape it above the mirror and view it from the doorway. If you don't check the projection, a deep shade can feel much larger than its front view suggests.

Choose a two- or three-light fitting

Two-light designs usually suit compact mirrors, cloakrooms and narrow vanity units. Three lights create a wider line and can feel more balanced above a generous single basin or broader mirror. The number of shades matters, but their diameter and spacing matter just as much.

The porcelain petal bathroom vanity light is listed in a 39 cm two-light version and a 55 cm three-light version. Each shade is approximately 13 cm in diameter. Compare those actual dimensions with your mirror rather than assuming that three lights will automatically suit every family bathroom.

Position the light above the mirror

Centre the fitting visually over the mirror, then check that the shades clear the frame and any cabinet door. Leave enough room to remove bulbs and clean the ceramic without knocking the glass or mirror. A tall user should not see bare bulbs directly at eye level when standing at the basin.

I'd usually align the fitting with the mirror rather than the full vanity if those widths differ. The mirror is the stronger visual reference when you look straight ahead. However, an offset basin or asymmetrical cabinetry may need a deliberate centre line of its own.

Control glare and choose the light colour

Downward-facing shades can place useful light around the top of the mirror, but one overhead source may still cast shadows beneath the eyes and chin. Combine it with general ceiling light, and consider side lighting if accurate grooming light is important. Choose diffused LED bulbs that fit fully inside the shades.

I think a warm-to-neutral white usually gives a comfortable bathroom atmosphere without making skin tones look too yellow or clinically blue. Keep every bulb in a multi-light fitting the same colour temperature and output. If dimming matters, the bulbs, dimmer and circuit must all be compatible.

Confirm bathroom suitability before installation

A decorative bathroom description does not by itself confirm suitability for every position. Bathroom zones and exposure to splashes affect the IP rating required, so check the stated rating for the exact model and ask a qualified electrician to approve its location. The product page lists 110-240V, E27 bulbs and LED compatibility, with bulbs not included.

When you have the mirror width, wall clearance and electrician's advice, compare the two- and three-light porcelain options against your paper template. That final scale check is more reliable than choosing from a close-up product image.