Energizer 13.5W LED GLS Bulb 4 Pack - B22, 3000K Warm White, 1521lm

The Energizer LED GLS is a 13.5W LED bulb with a B22 bayonet cap, delivering 1521 lumens at 3000K warm white. This 4-pack format provides direct replacements for four 100W incandescent bulbs across the home, cutting energy consumption by approximately 86% per fitting while maintaining equivalent brightness. Each bulb measures 60mm diameter by 120mm height, fitting standard GLS-compatible lampholders in ceiling pendants, table lamps and wall fittings.

Designed for living rooms, bedrooms, dining rooms and hallways where warm ambient light is needed, the 3000K colour temperature produces a soft white glow similar to traditional tungsten bulbs. The 240-degree beam angle provides wide light distribution suitable for general room illumination rather than directed task lighting. The B22 bayonet fitting is standard across most UK domestic light fittings, making installation a direct push-and-twist replacement of existing bulbs.

Each bulb carries a 15-year rated lifespan based on average domestic use of 2.7 hours per day, equating to approximately 15,000 hours of operation before significant lumen degradation. The bulbs are non-dimmable and should not be paired with dimmer switches, as this can cause flickering or premature failure. The Energy Rating E classification reflects the bulb's efficiency relative to current LED technology standards, where A-rated bulbs represent the most efficient options available.

The 4-pack format suits households replacing multiple bulbs simultaneously during refurbishment or upgrade projects, providing cost savings over individual bulb purchases. The frosted GLS envelope diffuses the LED chip array inside, preventing visible point sources and hot spots when viewed directly.

Can these bulbs be used with dimmer switches?

No. These bulbs are non-dimmable and should not be installed in fittings controlled by dimmer switches. Attempting to dim non-dimmable LED bulbs typically causes flickering, buzzing or premature failure. For dimmable alternatives, search for Energizer dimmable B22 bulbs in the Niori catalogue.

What wattage incandescent bulb do these replace?

Each 13.5W LED bulb produces 1521 lumens, which is equivalent to a traditional 100W incandescent bulb. The energy saving is approximately 86.5W per bulb, or 346W across all four bulbs in the pack when compared to the incandescent equivalents.

What does the 15-year lifespan rating mean?

The 15-year rating is based on an average usage of 2.7 hours per day, totalling approximately 15,000 operating hours. Actual lifespan varies depending on daily usage — bulbs used for longer periods each day will reach end-of-life sooner in calendar terms, though they still deliver the same total hours of operation.

Will these fit E27 Edison screw fittings?

No. These bulbs have B22 bayonet caps (the push-and-twist type standard in UK domestic fittings). For Edison screw fittings (common in Europe and some commercial UK installations), you need E27-capped versions. Check the lamp base specification in your existing fitting before ordering.