Eveready 3.1W GU10 LED Bulb Cool White 4000K Non-Dimmable

The Eveready GU10 is a 3.1W LED bulb delivering 250 lumens at 4000K cool white colour temperature with a 110° beam angle. The bulb fits standard GU10 bayonet fittings commonly used in recessed downlights, track lighting and adjustable spotlights across UK residential and commercial installations. It replaces 35W halogen equivalents while consuming 3.1W on 220-240V mains.

Designed for kitchens, home offices, garages, workshop areas and retail environments where bright functional light is needed, the 4000K cool white output sits between warm white (2700K-3000K) and daylight (5000K+), providing neutral clarity without the yellow warmth of traditional bulbs or the clinical harshness of daylight LEDs. The 110° beam angle gives wide light distribution across worktops, desk surfaces and general room areas without creating tight spotlight pools.

The bulb carries a rated lifespan of 10,000 hours and withstands over 10,000 switching cycles, making it suitable for high-use areas where lights are switched on and off frequently throughout the day. At typical usage of 3 hours per day, the 10,000-hour rating translates to approximately 10 years of operation. The non-dimmable design means the bulb should not be paired with dimmer switches — it operates at full 250 lumens output only.

The 50mm diameter and 57mm height dimensions are standard GU10 proportions and fit flush within typical recessed downlight housings without protruding below ceiling level. The bulb weighs 30g and the Energy Rating G reflects current EU energy labelling standards for LED bulbs in this output category.

Can this bulb be used with a dimmer switch?

No. This is a non-dimmable LED bulb and should not be installed on circuits controlled by dimmer switches. Attempting to dim a non-dimmable LED can cause flickering, buzzing, reduced lifespan or complete failure. For dimmable GU10 LEDs, see the dimmable variants in the Eveready range.

What's the difference between 4000K cool white and warm white?

4000K cool white provides a neutral, slightly crisp light that sits between the yellow warmth of 2700K-3000K warm white and the blue-toned daylight of 5000K+. Cool white is commonly chosen for task lighting in kitchens, offices and workshops where colour clarity matters, while warm white suits living rooms and bedrooms where a softer ambient tone is preferred.

How long will this bulb last?

The bulb is rated for 10,000 hours of operation and over 10,000 switching cycles. At typical usage of 3 hours per day, this translates to approximately 10 years. Actual lifespan depends on operating conditions, ambient temperature and switching frequency.

Will this fit my existing GU10 downlights?

Yes. The 50mm diameter and 57mm height are standard GU10 dimensions and the bulb fits any UK-standard GU10 socket. The bulb sits flush within typical recessed downlight housings and does not protrude below ceiling level.