Free Delivery on all orders over £99*

Energizer 4.2W G9 LED Capsule Bulb 470lm 4000K Cool White Non-Dimmable

£199
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
We are an Independent UK Company
Price match. Found it cheaper? Contact us
Trade Discount Available
Description

The Energizer 4.2W G9 LED capsule bulb produces 470 lumens at 4000K cool white colour temperature, serving as a direct replacement for traditional 40W halogen G9 bulbs while consuming approximately 90% less energy. The G9 bi-pin base fits standard push-in sockets found in wall lights, chandeliers, pendant fittings, and under-cabinet lighting across UK homes.

Suited to kitchens, bathrooms (check IP rating of the fitting), hallways and living spaces where clean, neutral light is needed for tasks and general illumination, the 4000K output sits between warm white (2700-3000K) and daylight (5000K+), providing clarity without the harshness of cooler tones. The 300-degree beam angle spreads light broadly from the compact capsule body, reducing shadows in multi-bulb fittings.

The bulb carries a 15-year rated lifespan based on average domestic use, significantly outlasting halogen equivalents which typically require replacement every 1-2 years. The non-dimmable circuitry means the bulb is incompatible with dimmer switches but delivers consistent output from switch-on without warm-up time. The compact capsule format measures approximately 15mm diameter, maintaining the low-profile aesthetic of halogen G9s while running cooler during operation.

Specification
Wattage 4.2W
Lumen 470
Lamp Shape Capsule
Lamp Base G9
Energy Rating E
Kelvin 4,000K
Colour Temperature Cool White
Dimmable No
Beam Angle 300
LED or Halogen LED
Frequently Asked

Is this bulb dimmable?

No. The bulb is non-dimmable and will not function correctly with dimmer switches. Using it on a dimmed circuit may cause flickering or damage to the bulb. If dimming is required, a separate dimmable G9 LED must be used.

What is the difference between 4000K and warmer colour temperatures?

4000K cool white produces a neutral, slightly crisp light that resembles overcast daylight, making it well-suited to task lighting in kitchens and bathrooms. Warmer temperatures like 2700-3000K produce a more yellow-toned light closer to traditional incandescent bulbs, often preferred in living rooms and bedrooms for a cosier feel.

Can this be used in enclosed fittings?

Most LED G9 capsule bulbs including Energizer models are designed to tolerate enclosed fittings, but check the specific fitting allows adequate ventilation. LEDs run cooler than halogens but still generate heat, so fully sealed glass shades may shorten lifespan if airflow is completely blocked.

How long does the 15-year lifespan rating assume the bulb is used?

The 15-year rating is typically based on 3 hours of use per day. Actual lifespan will vary depending on daily usage — higher usage shortens the timeline in years but the total operating hours remain 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.

See it lit, in person

Lighting looks different in a real room. Come and see our range at our showrooms in Birmingham, Hong Kong and Dubai, or talk to our design team wherever you are.

Niori lighting showroom trailer video with closeups of alabaster lighting

Why Niori

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.

Genuine products

An authorised stockist

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 G9 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.

You Might Also Like

Recommended For You

    Our Reviews

    From first click to final installation, our customers share how Niori lights up their spaces. Read their words and envision what’s possible for yours.

    Featured Projects

    Step into our portfolio and see how we transform homes, restaurants, and commercial spaces and more, worldwide. Click here for a closer look at our latest projects.

    Description

    The Energizer 4.2W G9 LED capsule bulb produces 470 lumens at 4000K cool white colour temperature, serving as a direct replacement for traditional 40W halogen G9 bulbs while consuming approximately 90% less energy. The G9 bi-pin base fits standard push-in sockets found in wall lights, chandeliers, pendant fittings, and under-cabinet lighting across UK homes.

    Suited to kitchens, bathrooms (check IP rating of the fitting), hallways and living spaces where clean, neutral light is needed for tasks and general illumination, the 4000K output sits between warm white (2700-3000K) and daylight (5000K+), providing clarity without the harshness of cooler tones. The 300-degree beam angle spreads light broadly from the compact capsule body, reducing shadows in multi-bulb fittings.

    The bulb carries a 15-year rated lifespan based on average domestic use, significantly outlasting halogen equivalents which typically require replacement every 1-2 years. The non-dimmable circuitry means the bulb is incompatible with dimmer switches but delivers consistent output from switch-on without warm-up time. The compact capsule format measures approximately 15mm diameter, maintaining the low-profile aesthetic of halogen G9s while running cooler during operation.

    Specification
    Wattage 4.2W
    Lumen 470
    Lamp Shape Capsule
    Lamp Base G9
    Energy Rating E
    Kelvin 4,000K
    Colour Temperature Cool White
    Dimmable No
    Beam Angle 300
    LED or Halogen LED
    Frequently Asked

    Is this bulb dimmable?

    No. The bulb is non-dimmable and will not function correctly with dimmer switches. Using it on a dimmed circuit may cause flickering or damage to the bulb. If dimming is required, a separate dimmable G9 LED must be used.

    What is the difference between 4000K and warmer colour temperatures?

    4000K cool white produces a neutral, slightly crisp light that resembles overcast daylight, making it well-suited to task lighting in kitchens and bathrooms. Warmer temperatures like 2700-3000K produce a more yellow-toned light closer to traditional incandescent bulbs, often preferred in living rooms and bedrooms for a cosier feel.

    Can this be used in enclosed fittings?

    Most LED G9 capsule bulbs including Energizer models are designed to tolerate enclosed fittings, but check the specific fitting allows adequate ventilation. LEDs run cooler than halogens but still generate heat, so fully sealed glass shades may shorten lifespan if airflow is completely blocked.

    How long does the 15-year lifespan rating assume the bulb is used?

    The 15-year rating is typically based on 3 hours of use per day. Actual lifespan will vary depending on daily usage — higher usage shortens the timeline in years but the total operating hours remain 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.