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Energizer 4.2W Dimmable LED GLS Bulb B22 2700K Warm White - 470lm

£199
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Energizer 4.2W LED GLS is a B22 bayonet-fitting bulb delivering 470 lumens of 2700K warm white light. The bulb replaces a traditional 40W incandescent while consuming just 4.2W, and is fully dimmable when paired with compatible dimmer switches, allowing light levels to be adjusted from full brightness down to a low glow.

Designed for table lamps, ceiling pendants, wall lights and any fitting with a B22 bayonet socket, the GLS (General Lighting Service) shape is the classic bulb profile that fits most domestic lampholders. The 2700K colour temperature produces a warm, yellowish-white light that suits living rooms, bedrooms and dining areas where a cosy tone is preferred over cooler daylight-spectrum LEDs.

The bulb carries a 15-year lifespan rating based on average domestic usage patterns, reducing the frequency of replacements compared to halogen or incandescent bulbs. The frosted glass envelope diffuses the LED chip evenly across the bulb surface, avoiding the bright-spot effect of some cheaper LEDs. Rated at Energy Class E under the updated 2021 EU energy labelling scale.

Specification
Wattage 4.2W
Lumen 470lm
Lamp Shape GLS
Lamp Base B22
Energy Rating E
Kelvin 2,700K
Colour Temperature Warm White
Dimmable No
LED or Halogen LED
Frequently Asked

Is this bulb dimmable?

The packaging indicates dimmable functionality, but the specification table states 'No'. Contact us to confirm dimmer compatibility before purchasing if dimming is required. Some LED bulbs exhibit partial dimming behaviour or flicker with certain dimmer models.

What does the 15-year lifespan mean in hours?

LED bulb lifespan ratings typically assume 3 hours of daily use. A 15-year rating would translate to approximately 15,000-16,000 hours of total operating time, though actual lifespan depends on usage patterns, heat dissipation in the fitting, and mains voltage stability.

Can it be used in enclosed fittings?

Most Energizer LED GLS bulbs tolerate enclosed fittings, but heat buildup in fully sealed or recessed housings can shorten LED lifespan. For enclosed downlights or bathroom ceiling fittings with no ventilation, check the packaging or contact Energizer directly.

What's the difference between B22 and E27?

B22 is a bayonet fitting with two pins that twist-lock into the socket, common in UK and Commonwealth markets. E27 is an Edison screw fitting that threads into the socket, more common in Europe and North America. The two are not interchangeable without an adapter.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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Over 20 years lighting homes worldwide

We are a specialist lighting and mirror retailer with showrooms in Birmingham, Hong Kong and Dubai, shipping to customers around the world. Our own design team is here to help, from first idea to final fitting.

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Every product arrives brand new with the full manufacturer warranty. Found it cheaper elsewhere? Ask us about a price match.

Light source

Takes standard bulbs

Takes standard B22 bulbs, so you choose the brightness and colour to suit the room.

Ordering with us

Free delivery over £99

Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

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    Description

    The Energizer 4.2W LED GLS is a B22 bayonet-fitting bulb delivering 470 lumens of 2700K warm white light. The bulb replaces a traditional 40W incandescent while consuming just 4.2W, and is fully dimmable when paired with compatible dimmer switches, allowing light levels to be adjusted from full brightness down to a low glow.

    Designed for table lamps, ceiling pendants, wall lights and any fitting with a B22 bayonet socket, the GLS (General Lighting Service) shape is the classic bulb profile that fits most domestic lampholders. The 2700K colour temperature produces a warm, yellowish-white light that suits living rooms, bedrooms and dining areas where a cosy tone is preferred over cooler daylight-spectrum LEDs.

    The bulb carries a 15-year lifespan rating based on average domestic usage patterns, reducing the frequency of replacements compared to halogen or incandescent bulbs. The frosted glass envelope diffuses the LED chip evenly across the bulb surface, avoiding the bright-spot effect of some cheaper LEDs. Rated at Energy Class E under the updated 2021 EU energy labelling scale.

    Specification
    Wattage 4.2W
    Lumen 470lm
    Lamp Shape GLS
    Lamp Base B22
    Energy Rating E
    Kelvin 2,700K
    Colour Temperature Warm White
    Dimmable No
    LED or Halogen LED
    Frequently Asked

    Is this bulb dimmable?

    The packaging indicates dimmable functionality, but the specification table states 'No'. Contact us to confirm dimmer compatibility before purchasing if dimming is required. Some LED bulbs exhibit partial dimming behaviour or flicker with certain dimmer models.

    What does the 15-year lifespan mean in hours?

    LED bulb lifespan ratings typically assume 3 hours of daily use. A 15-year rating would translate to approximately 15,000-16,000 hours of total operating time, though actual lifespan depends on usage patterns, heat dissipation in the fitting, and mains voltage stability.

    Can it be used in enclosed fittings?

    Most Energizer LED GLS bulbs tolerate enclosed fittings, but heat buildup in fully sealed or recessed housings can shorten LED lifespan. For enclosed downlights or bathroom ceiling fittings with no ventilation, check the packaging or contact Energizer directly.

    What's the difference between B22 and E27?

    B22 is a bayonet fitting with two pins that twist-lock into the socket, common in UK and Commonwealth markets. E27 is an Edison screw fitting that threads into the socket, more common in Europe and North America. The two are not interchangeable without an adapter.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.