Energizer 18W LED GLS Bulb B22 Daylight 6500K - Non-Dimmable, 2542lm

The Energizer 18W LED GLS bulb delivers 2542 lumens of 6500K daylight white light through a standard GLS (general lighting service) shape with a B22 bayonet cap. The 18W power draw replaces a traditional 150W incandescent, providing the same brightness at an 88% reduction in energy consumption. The bulb is rated for up to 15 years of typical domestic use based on 3 hours per day operation.

Designed for task-oriented spaces where cool, bright light supports concentration and visibility, the 6500K colour temperature suits offices, workshops, kitchens, garages, and utility rooms. The high lumen output provides sufficient illumination for larger rooms or work areas where detailed tasks such as reading, cooking, or assembly work take place. The B22 bayonet fitting is the standard UK light bulb cap and fits most domestic ceiling fittings, table lamps and floor lamps designed for traditional bulbs.

The bulb is non-dimmable and should not be paired with dimmer switches, as this can cause flicker or shorten the LED lifespan. The frosted GLS envelope diffuses the light evenly in all directions, avoiding harsh point-source glare from exposed LED chips. Energizer rates this bulb with an Energy Rating of D under the updated 2021 EU energy labelling system, which rescaled all ratings to account for LED efficiency improvements.

What does 6500K daylight white look like compared to warm white?

6500K produces a cool, blue-toned white light similar to midday sunlight on an overcast day. This is noticeably cooler than the 2700K-3000K warm white used in living rooms and bedrooms. Daylight white bulbs suit workspaces where visual clarity matters more than creating a cosy atmosphere.

Can this bulb be used with a dimmer switch?

No. This bulb is non-dimmable and should not be fitted to a circuit with a dimmer switch. Using a non-dimmable LED with a dimmer can cause flicker, buzzing, reduced lifespan, or failure to light at all.

What does the 15-year lifespan mean in actual hours?

The 15-year claim is based on 3 hours of use per day, which equals approximately 16,425 hours of rated life. If the bulb is used for longer periods each day, the total years of service will be proportionally shorter.

Will this fit my existing light fitting?

The B22 bayonet cap is the standard UK bulb fitting used in most domestic ceiling lights, table lamps and floor lamps. If your current bulb has two pins that push and twist into the socket, this bulb will fit. If your fitting uses a screw cap (E27 or E14), you will need the screw-cap version of this bulb instead.