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Energizer 9.5W E27 GLS LED Bulb - Cool White 4000K Non-Dimmable

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

The Energizer 9.5W GLS LED bulb fits a standard E27 screw base and outputs 1050 lumens at 4000K cool white. The classic GLS (general lighting service) shape measures approximately 60mm diameter and 110mm height, matching the form factor of traditional incandescent bulbs. The 9.5W power draw replaces a 75W incandescent equivalent, reducing energy consumption by around 87% for the same lumen output.

Designed for task-oriented spaces where neutral, bright light supports visibility and concentration, the 4000K colour temperature suits kitchens, utility rooms, garages, home offices and hallways. The cool white tone falls between warm yellow (2700K-3000K) and clinical daylight (5000K-6500K), providing clarity without the starkness of higher colour temperatures. The bulb operates on 230V mains and delivers instant-on brightness without warm-up delay.

The bulb is non-dimmable and carries an E energy rating under current UK labelling regulations. Energizer rates the LED for a 15-year lifespan based on average household use of 2.7 hours per day, equating to approximately 15,000 switching cycles. The frosted glass diffuser spreads light evenly across a 240-degree beam angle, reducing glare and hot spots compared to clear LED filaments.

Specification
Wattage 9.5W
Lumen 1060lm
Lamp Shape GLS
Lamp Base E27
Energy Rating (New Regs) E
Kelvin 4,000K
Colour Temperature Cool White
Dimmable? Yes
LED or Halogen LED
Frequently Asked

Is this bulb dimmable?

No. Despite the specification table indicating 'Yes', the product title and URL confirm this is a non-dimmable bulb. Do not connect it to a dimmer circuit — doing so may cause flickering, buzzing or premature failure.

What does 4000K cool white look like?

4000K sits in the neutral white range, appearing brighter and whiter than warm white (2700K-3000K) without the blue cast of daylight bulbs (5000K+). It provides clear visibility for tasks like food prep, reading documents or detailed work without feeling harsh.

How long will it last?

Energizer rates this bulb for a 15-year lifespan based on 2.7 hours of daily use. Actual longevity depends on switching frequency, ambient temperature and fixture ventilation. LEDs degrade gradually rather than failing instantly, so expect a slow reduction in brightness over the rated period.

Can I use this in an enclosed fitting?

Most GLS LED bulbs tolerate enclosed fittings, but check that the fitting allows some airflow. Fully sealed, poorly ventilated enclosures can shorten LED lifespan due to heat buildup. If in doubt, leave the fitting slightly open or choose a bulb rated explicitly for enclosed use.

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 E27 bulbs, so you choose the brightness and colour to suit the room.

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    Description

    The Energizer 9.5W GLS LED bulb fits a standard E27 screw base and outputs 1050 lumens at 4000K cool white. The classic GLS (general lighting service) shape measures approximately 60mm diameter and 110mm height, matching the form factor of traditional incandescent bulbs. The 9.5W power draw replaces a 75W incandescent equivalent, reducing energy consumption by around 87% for the same lumen output.

    Designed for task-oriented spaces where neutral, bright light supports visibility and concentration, the 4000K colour temperature suits kitchens, utility rooms, garages, home offices and hallways. The cool white tone falls between warm yellow (2700K-3000K) and clinical daylight (5000K-6500K), providing clarity without the starkness of higher colour temperatures. The bulb operates on 230V mains and delivers instant-on brightness without warm-up delay.

    The bulb is non-dimmable and carries an E energy rating under current UK labelling regulations. Energizer rates the LED for a 15-year lifespan based on average household use of 2.7 hours per day, equating to approximately 15,000 switching cycles. The frosted glass diffuser spreads light evenly across a 240-degree beam angle, reducing glare and hot spots compared to clear LED filaments.

    Specification
    Wattage 9.5W
    Lumen 1060lm
    Lamp Shape GLS
    Lamp Base E27
    Energy Rating (New Regs) E
    Kelvin 4,000K
    Colour Temperature Cool White
    Dimmable? Yes
    LED or Halogen LED
    Frequently Asked

    Is this bulb dimmable?

    No. Despite the specification table indicating 'Yes', the product title and URL confirm this is a non-dimmable bulb. Do not connect it to a dimmer circuit — doing so may cause flickering, buzzing or premature failure.

    What does 4000K cool white look like?

    4000K sits in the neutral white range, appearing brighter and whiter than warm white (2700K-3000K) without the blue cast of daylight bulbs (5000K+). It provides clear visibility for tasks like food prep, reading documents or detailed work without feeling harsh.

    How long will it last?

    Energizer rates this bulb for a 15-year lifespan based on 2.7 hours of daily use. Actual longevity depends on switching frequency, ambient temperature and fixture ventilation. LEDs degrade gradually rather than failing instantly, so expect a slow reduction in brightness over the rated period.

    Can I use this in an enclosed fitting?

    Most GLS LED bulbs tolerate enclosed fittings, but check that the fitting allows some airflow. Fully sealed, poorly ventilated enclosures can shorten LED lifespan due to heat buildup. If in doubt, leave the fitting slightly open or choose a bulb rated explicitly for enclosed use.

    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.