Energizer LED GU10 Bulb, 4.2W, 345 Lumen, 6500K Daylight

This Energizer LED GU10 bulb puts out a bright 345 lumens in a crisp 6500K daylight white from just 4.2W, roughly a 50W halogen equivalent. It's a well-known, widely stocked brand for anyone wanting a reliable, energy-saving replacement for an old halogen GU10 spotlight, and the daylight colour temperature makes it a strong fit for kitchens, bathrooms and workspaces.

Key features

• 345 lumens
• 4.2W LED (roughly a 50W halogen equivalent)
• 6500K daylight white light
• Standard GU10 spot beam
• Rated for around 15,000 hours of use
• Compact 50 x 54mm size, close to a standard halogen GU10

What this bulb is best for

The 6500K daylight tone suits kitchens, bathrooms (fitting permitting - see FAQs below), utility rooms and home offices, where you want a bright, clear light for cooking, cleaning or working rather than a soft evening glow. Its compact size also makes it a good match for downlights with limited depth behind the ceiling.

How to fit it

1. Turn off the power at the switch before you start.
2. If you're replacing an old bulb, let it cool down fully first.
3. Twist the old bulb anticlockwise a quarter turn and pull it free.
4. Push the new Energizer GU10 bulb in and twist clockwise until it clicks into place.
5. Restore power at the switch.

GU10 bulbs run directly on mains voltage, so there's no transformer or separate driver to fit - it's a like-for-like swap in your existing fitting.

Frequently asked questions

Is this Energizer GU10 bulb dimmable?

No, this is a standard non-dimmable spotlight. If you need a dimmable GU10, check our TCP dimmable range on this collection instead.

Will this fit a shallow downlight?

At 50 x 54mm, this bulb is a similar size to a standard halogen GU10, so it should fit the great majority of existing GU10 downlights without needing a deeper fitting.

Is 6500K too bright or cold for everyday rooms?

6500K is a clean, energising daylight tone rather than a harsh one - it's popular for kitchens and bathrooms, though if you prefer a cosier feel for living rooms or bedrooms, a 2700K warm white bulb would suit better.

How does this compare to a 50W halogen GU10?

At 4.2W for 345 lumens, this bulb gives broadly similar brightness to a 50W halogen while using well over 90% less energy, so it pays for itself quickly through lower running costs.

Technical specification

More GU10 bulbs

• JCB LED GU10 Bulb, 3W, 250 Lumen, 4000K Cool White
• TCP LED GU10 Glass Bulb, 345 Lumen, 6500K Daylight, Dimmable, Pack of 2
• TCP LED GU10 Bulb, 250 Lumen, 6500K Daylight, Pack of 4
• Shop all GU10 bulbs