TCP LED GU10 Glass Bulb, 345 Lumen, 2700K Warm White, Dimmable, Pack of 2

This TCP LED GU10 glass bulb combines a bright 345 lumen output with a warm 2700K white and full dimming support, making it one of the more versatile bulbs in TCP's GU10 range. Running at around 4.4W (roughly a 50W halogen equivalent), it suits living rooms, bedrooms and dining areas where you want a proper, cosy brightness that you can also turn down for evenings. This listing is for a pack of 2 bulbs.

Key features

• 345 lumens per bulb
• Approx. 4.4W LED (roughly a 50W halogen equivalent)
• 2700K warm white light
• 36° beam angle, standard GU10 spot
• Dimmable (with a compatible LED dimmer switch)
• Rated for around 25,000 hours of use, pack of 2

What this bulb is best for

The warm 2700K tone paired with dimming makes this a strong choice for living rooms, bedrooms and dining rooms, where you might want full brightness for cleaning or entertaining and a softer glow for relaxing in the evening. It also works well over a dining table on a dimmer for setting the mood at mealtimes.

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 TCP 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

Do I need a special dimmer switch for this bulb?

You need a dimmer rated for LED bulbs. An older leading-edge dimmer designed for halogen bulbs can cause flickering or buzzing with LEDs, so an LED-compatible trailing-edge dimmer will give the smoothest results.

Is 2700K the same as a traditional halogen or filament bulb?

Yes, 2700K is the classic warm white tone most people associate with older halogen and filament bulbs, so this is a safe like-for-like choice if you're replacing halogen GU10s and want to keep the same feel.

Is this bulb bright enough for a living room?

345 lumens per bulb is a solid brightness for a living room spotlight, particularly when used as one of several bulbs across a ceiling - most living rooms use four to six spotlights on one dimmer circuit.

What's the difference between this and the non-dimmable 345 lumen version?

They share the same lumens, wattage and 2700K colour - the only difference is that this one supports dimming, while our non-dimmable 345 lumen bulb is a straightforward on/off spotlight.

Technical specification

More GU10 bulbs

• TCP LED GU10 Glass Bulb, 345 Lumen, 6500K Daylight, Dimmable, Pack of 2
• TCP LED GU10 Bulb, White Finish, 345 Lumen, 2700K Warm White, Non-Dimmable, Pack of 2
• TCP LED GU10 Bulb, 250 Lumen, 2700K Warm White, Pack of 4
• Shop all GU10 bulbs