GX53 LED Bulbs

What is a GX53 LED bulb?

GX53 is the name of the cap, the part that connects a bulb to its holder. A GX53 lamp is usually a flat, round disc with a pair of pins on the back, and the number in the name is the gap between those pins in millimetres. That shallow profile lets a light sit almost flush in a ceiling, a shelf or the underside of a wall cabinet, where a deeper bulb would not fit. Every bulb on this page has a GX53 cap, so your real choices are colour, brightness and dimming.

How do you fit a GX53 LED bulb?

Changing the bulb takes seconds. Switch off at the wall, and at the consumer unit if you are unsure which circuit the light is on, then let the old bulb cool. Unclip any cover or trim ring, turn the bulb anticlockwise until it unlocks and ease it out. Line up the pins of the replacement with the slots in the holder, push it in and turn it clockwise until it locks.

Fitting a GX53 downlight or wiring a holder is a different matter. Electrical work in a home in England and Wales comes under Part P of the Building Regulations, so we recommend a qualified electrician for anything beyond a bulb change.

Warm white, cool white or daylight GX53 LED bulbs?

Colour temperature is measured in kelvin, and the lower the figure, the warmer the light looks. Most of our GX53 bulbs are warm white, the soft, familiar tone that suits living rooms, bedrooms and hallways. We also stock cool white bulbs, which look crisper and cleaner, and daylight bulbs, the whitest option. A cooler white is the usual pick for kitchens, utility rooms and anywhere you cook, read or work close up.

If you are replacing a bulb in a row of downlights, match the colour temperature of the others, or the ceiling will look patchy.

How bright should a GX53 LED bulb be?

Lumens measure brightness and watts measure power, so compare lumens when you weigh up bulbs side by side. The majority of our range is low-wattage, which is usually plenty for cabinet lighting, accent lighting and downlights fitted in a group. Many are higher-wattage and generally give more light, which helps where a fitting has to light a hallway or a small kitchen on its own.

Across a ceiling, more fittings spaced evenly usually look better than a handful of very bright ones, which leave pools of light and dark corners.

Can you dim a GX53 LED bulb?

Only if the bulb is made to dim. Most of our GX53 bulbs are non-dimmable and belong on a standard on/off switch, while many are dimmable, so check the listing before you order. A dimmable LED also needs a dimmer made for LED loads, because older dimmers built for filament bulbs expect a much higher load and can make LEDs flicker, buzz or cut out at the low end.

With a group of dimmable bulbs on the same dimmer, check their combined wattage sits within its LED load range.

What to check before buying GX53 LED bulbs

Start with size. Every GX53 bulb shares the same cap, but depth and diameter can differ, and a deeper bulb may not sit flush in a tight recess or behind a cover. Most of the bulbs here are small, but measure the old bulb before you order. Next, the rating: many of our GX53 bulbs are rated IP20, which is meant for dry indoor spaces. A bathroom needs a fitting rated for its zone, which near water means IP44 or above, so check the rating of the whole fitting, not only the bulb.

Most of the range has a white finish, which sits quietly against a white ceiling, and we also stock a bulb with an opal finish. Many are made of plastic or polycarbonate, and some use aluminium.