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Energizer 4.2W LED GLS Bulb E27 6500K Daylight - Non-Dimmable 470lm

£149
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Description

The Energizer LED GLS is a 4.2W bulb with an E27 screw base, delivering 470 lumens of 6500K daylight-spectrum light. The GLS (General Lighting Service) shape is the classic A-line bulb profile that fits most standard table lamps, ceiling pendants and wall fittings designed for traditional incandescent bulbs.

Suited to kitchens, home offices, workshops and utility rooms where clear visibility matters, the 6500K colour temperature produces a cool, neutral white light that closely matches midday outdoor conditions. This spectrum aids concentration and colour accuracy for tasks like reading small print, detail work, and food preparation. The bulb replaces a 40W incandescent while consuming 4.2W, cutting energy use by approximately 90% for the same lumen output.

The bulb measures 60mm diameter by 128mm height, fitting within the standard GLS envelope dimensions. The E27 base is the larger of the two UK Edison screw standards and fits any fixture marked ES or E27. Energizer rates the bulb for up to 15 years of typical domestic use (approximately 15,000 hours at 3 hours per day), meaning fewer replacements compared to traditional incandescent or halogen bulbs. The bulb is non-dimmable and should only be used on standard on/off circuits.

Specification
Width (mm) 60
Height (mm) 128
Depth (mm) 60
Wattage 4.2W
Lumen 470lm
Lamp Shape GLS
Lamp Base E27
Energy Rating E
Kelvin 6,500K
Colour Temperature Daylight
Dimmable No
LED or Halogen LED
Frequently Asked

Can this bulb be used with a dimmer switch?

No. This bulb is non-dimmable and should only be used on standard on/off circuits. Using it with a dimmer switch may cause flickering, premature failure, or damage to the dimmer.

What is 6500K daylight suitable for?

6500K produces a cool, neutral white light that matches midday outdoor conditions. It aids concentration and colour accuracy, making it useful for reading, detail work, kitchens, workshops and home offices. For living rooms and bedrooms, most people prefer warmer temperatures like 2700K-3000K.

How does this compare to a 40W incandescent bulb?

This 4.2W LED produces 470 lumens, roughly equivalent to a 40W incandescent bulb. The LED consumes approximately 90% less energy and lasts significantly longer (15,000 hours vs approximately 1,000 hours for incandescent).

Will this fit my existing lamp?

If your lamp or fitting has an E27 (ES) screw base and accepts a standard GLS bulb shape (60mm diameter, 128mm height), this bulb will fit. Check the fitting's maximum wattage rating, though at 4.2W this bulb is well within the limits of most fixtures.

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 E27 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 LED GLS is a 4.2W bulb with an E27 screw base, delivering 470 lumens of 6500K daylight-spectrum light. The GLS (General Lighting Service) shape is the classic A-line bulb profile that fits most standard table lamps, ceiling pendants and wall fittings designed for traditional incandescent bulbs.

    Suited to kitchens, home offices, workshops and utility rooms where clear visibility matters, the 6500K colour temperature produces a cool, neutral white light that closely matches midday outdoor conditions. This spectrum aids concentration and colour accuracy for tasks like reading small print, detail work, and food preparation. The bulb replaces a 40W incandescent while consuming 4.2W, cutting energy use by approximately 90% for the same lumen output.

    The bulb measures 60mm diameter by 128mm height, fitting within the standard GLS envelope dimensions. The E27 base is the larger of the two UK Edison screw standards and fits any fixture marked ES or E27. Energizer rates the bulb for up to 15 years of typical domestic use (approximately 15,000 hours at 3 hours per day), meaning fewer replacements compared to traditional incandescent or halogen bulbs. The bulb is non-dimmable and should only be used on standard on/off circuits.

    Specification
    Width (mm) 60
    Height (mm) 128
    Depth (mm) 60
    Wattage 4.2W
    Lumen 470lm
    Lamp Shape GLS
    Lamp Base E27
    Energy Rating E
    Kelvin 6,500K
    Colour Temperature Daylight
    Dimmable No
    LED or Halogen LED
    Frequently Asked

    Can this bulb be used with a dimmer switch?

    No. This bulb is non-dimmable and should only be used on standard on/off circuits. Using it with a dimmer switch may cause flickering, premature failure, or damage to the dimmer.

    What is 6500K daylight suitable for?

    6500K produces a cool, neutral white light that matches midday outdoor conditions. It aids concentration and colour accuracy, making it useful for reading, detail work, kitchens, workshops and home offices. For living rooms and bedrooms, most people prefer warmer temperatures like 2700K-3000K.

    How does this compare to a 40W incandescent bulb?

    This 4.2W LED produces 470 lumens, roughly equivalent to a 40W incandescent bulb. The LED consumes approximately 90% less energy and lasts significantly longer (15,000 hours vs approximately 1,000 hours for incandescent).

    Will this fit my existing lamp?

    If your lamp or fitting has an E27 (ES) screw base and accepts a standard GLS bulb shape (60mm diameter, 128mm height), this bulb will fit. Check the fitting's maximum wattage rating, though at 4.2W this bulb is well within the limits of most fixtures.

    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.