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GX53 LED Bulbs

Flat, twist-fit GX53 LED bulbs for the shallow fittings and under-cabinet lights that take this cap. Outputs run from 5W up to 9W, in warm 3000K, neutral 4000K and brighter 5000K daylight white. Dimmable and non-dimmable models sit alongside higher-CRI80 and CRI90 options where you want colours to read more accurately around the home.

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What GX53 is

GX53 is a flat, round bulb with a twist-fit cap, named after the 53mm spacing of its two pins. Rather than screwing or bayoneting in, it locates into the holder and twists a quarter turn to lock. The shallow body is what makes it useful, fitting into spaces too tight for a deeper bulb.

The cap fitting

Every bulb in this range uses the GX53 cap, so there is no need to weigh up screw against bayonet here. The two pins set 53mm apart drop into the matching holder and twist home. It is a fitting you mostly meet in purpose-made fixtures rather than general-purpose lamps.

Brightness and colour

Outputs here run from 5W up to 9W. Colour temperatures described include warm white at 3000K, neutral 4000K and a brighter 5000K daylight white, so you can keep things cosy or go for a cleaner, whiter light. Dimmable and non-dimmable models are both listed, along with higher-CRI80 and CRI90 options where accurate colour matters.

Where they are used

The flat profile makes GX53 the bulb of choice for shallow ceiling fittings, under-cabinet lights and recessed fixtures with little depth behind them. It is common in kitchens and similar spaces where a deeper bulb would not sit flush.

How to choose

Since the cap is fixed, focus on output and colour: pick a wattage for the brightness you want and a colour temperature for the room, then decide on dimming and whether a higher CRI rating is worth it. Free UK delivery over £99, worldwide shipping.

Frequently Asked Questions

What is a GX53 bulb used for?
GX53 is a flat, twist-and-lock cap used in shallow fittings, downlights and under-cabinet lights where a deeper bulb will not fit. The slim disc shape keeps the fitting close to the ceiling or shelf.

How bright are these GX53 bulbs?
They run from around 5W up to 9W, with light output up to roughly 1000 lumens on the higher-wattage versions. The lower wattages suit accent and cabinet lighting, while 9W gives a brighter, more general light.

Are there dimmable GX53 options?
Yes, the range includes both dimmable and non-dimmable bulbs. If you want to dim, pick a bulb marked dimmable and use it with a compatible LED dimmer for steady control without flicker.

What does CRI80 and CRI90 mean?
CRI is the colour rendering index, a measure of how true colours look under the light. CRI80 is good for everyday use, while CRI90 shows colours more accurately, which helps in kitchens and anywhere you want finishes and food to look right.

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