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Energizer 3.4W GU10 LED Bulb Non-Dimmable - Cool White 4000K

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

The Energizer 3.4W GU10 LED bulb provides 345 lumens of cool white 4000K light through a 36° beam angle, designed to replace 50W halogen GU10 bulbs in downlights, track lights and recessed fittings. The non-dimmable LED draws 3.4W on 230V mains and is rated for a 25-year average lifespan based on typical domestic use, reducing the frequency of bulb replacements in ceiling fixtures.

The 4000K colour temperature sits in the cool white range, producing a neutral-to-slightly-blue-tinted light that works well in kitchens, bathrooms, utility rooms, garages and commercial environments where task visibility matters more than warmth. The 36° beam angle concentrates light into a focused spot rather than a wide flood, making it suitable for accent lighting, highlighting worktops, or fitting into directional ceiling downlights where the beam needs to be aimed at a specific surface.

The bulb measures 50mm diameter by 54mm height and fits the standard GU10 twist-and-lock base common in UK downlight fittings. At 30g per bulb, it weighs marginally more than a halogen equivalent but sits flush in most ceiling fixtures without needing modification. The 345-lumen output and 36° beam give a narrower, more defined pool of light compared to wider-angle GU10 LEDs, so spacing between fittings may need adjustment if replacing wide-angle halogens.

Specification
Weight (KG) 0.03
Width (mm) 50
Height (mm) 54
Depth (mm) 50
Wattage 3.4W
Lumen 345
Lamp Shape Spot
Lamp Base GU10
Energy Rating E
Kelvin 4,000K
Colour Temperature Cool White
Dimmable No
Beam Angle 36
LED or Halogen LED
Frequently Asked

Is this bulb dimmable?

No. The Energizer 3.4W GU10 LED is non-dimmable and should not be used with dimmer switches. Attempting to dim a non-dimmable LED can cause flickering, buzzing or premature failure.

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

4000K cool white produces a neutral-to-slightly-blue light that enhances task visibility and concentration. Warm white (2700K-3000K) has a yellow-amber tone closer to traditional tungsten bulbs. Cool white suits functional spaces like kitchens and bathrooms; warm white suits living rooms and bedrooms.

What does the 36° beam angle mean?

A 36° beam creates a focused spot of light rather than a wide flood. This makes the bulb suitable for accent lighting, highlighting specific areas, or fitting into directional downlights. Wider beam angles (60°+) spread light more evenly across a room.

Can it replace a 50W halogen directly?

Yes, in terms of fitting and installation. The GU10 base is a direct swap. However, the 345-lumen output and 36° beam differ from most 50W halogens, which typically produce 400-450 lumens with a wider beam. Check the beam angle of your existing halogen before replacing to ensure lighting coverage remains consistent.

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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Takes standard bulbs

Takes standard GU10 bulbs, so you choose the brightness and colour to suit the room.

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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 3.4W GU10 LED bulb provides 345 lumens of cool white 4000K light through a 36° beam angle, designed to replace 50W halogen GU10 bulbs in downlights, track lights and recessed fittings. The non-dimmable LED draws 3.4W on 230V mains and is rated for a 25-year average lifespan based on typical domestic use, reducing the frequency of bulb replacements in ceiling fixtures.

    The 4000K colour temperature sits in the cool white range, producing a neutral-to-slightly-blue-tinted light that works well in kitchens, bathrooms, utility rooms, garages and commercial environments where task visibility matters more than warmth. The 36° beam angle concentrates light into a focused spot rather than a wide flood, making it suitable for accent lighting, highlighting worktops, or fitting into directional ceiling downlights where the beam needs to be aimed at a specific surface.

    The bulb measures 50mm diameter by 54mm height and fits the standard GU10 twist-and-lock base common in UK downlight fittings. At 30g per bulb, it weighs marginally more than a halogen equivalent but sits flush in most ceiling fixtures without needing modification. The 345-lumen output and 36° beam give a narrower, more defined pool of light compared to wider-angle GU10 LEDs, so spacing between fittings may need adjustment if replacing wide-angle halogens.

    Specification
    Weight (KG) 0.03
    Width (mm) 50
    Height (mm) 54
    Depth (mm) 50
    Wattage 3.4W
    Lumen 345
    Lamp Shape Spot
    Lamp Base GU10
    Energy Rating E
    Kelvin 4,000K
    Colour Temperature Cool White
    Dimmable No
    Beam Angle 36
    LED or Halogen LED
    Frequently Asked

    Is this bulb dimmable?

    No. The Energizer 3.4W GU10 LED is non-dimmable and should not be used with dimmer switches. Attempting to dim a non-dimmable LED can cause flickering, buzzing or premature failure.

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

    4000K cool white produces a neutral-to-slightly-blue light that enhances task visibility and concentration. Warm white (2700K-3000K) has a yellow-amber tone closer to traditional tungsten bulbs. Cool white suits functional spaces like kitchens and bathrooms; warm white suits living rooms and bedrooms.

    What does the 36° beam angle mean?

    A 36° beam creates a focused spot of light rather than a wide flood. This makes the bulb suitable for accent lighting, highlighting specific areas, or fitting into directional downlights. Wider beam angles (60°+) spread light more evenly across a room.

    Can it replace a 50W halogen directly?

    Yes, in terms of fitting and installation. The GU10 base is a direct swap. However, the 345-lumen output and 36° beam differ from most 50W halogens, which typically produce 400-450 lumens with a wider beam. Check the beam angle of your existing halogen before replacing to ensure lighting coverage remains consistent.

    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.