Sylvania LED GU10 Bulb, 550 Lumen, Very Warm White

This Sylvania RefLED Superia GU10 bulb is a premium professional-grade lamp giving a rich 550 lumens of very warm white (2700K) light from 6W. It's fully dimmable, has a full glass reflector body that mimics the look of a traditional halogen GU10, and includes COOLFIT overheat protection along with a high CRI80 colour rendering for more natural-looking colours.

Key features

• 550 lumen output, very warm / extra warm white (2700K) light
• 6W power draw, dimmable
• 36 degree beam angle, full glass reflector design
• CRI80 colour rendering for natural, accurate colours
• 25,000 hour rated life, over 100,000 switching cycles
• COOLFIT functionality helps protect against overheating
• 5 year manufacturer warranty

What this bulb is best for

Living rooms, dining rooms, hotels and restaurants where a rich, cosy, professional-quality light and reliable dimming matter — this is a step up from a basic budget GU10, aimed at spaces where light quality and longevity are a priority.

How to fit it

Switch off the power at the wall or light switch before changing any bulb. If the old bulb has just been in use, let it cool for a minute or two before touching it. Twist the old GU10 bulb anticlockwise until the two pins release from the ceramic base, then pull it straight out. Line up the pins of the new Sylvania bulb with the two slots in the fitting, push in gently and twist clockwise until it locks into place. Restore power and test the light. No transformer or driver is needed — GU10 LED bulbs run directly from the UK mains supply.

Frequently asked questions

Is this Sylvania Superia bulb dimmable?

Yes. For the smoothest dimming, use an LED-compatible trailing-edge dimmer switch rather than an older leading-edge dimmer designed for halogen bulbs.

What colour temperature is 'very warm white'?

Around 2700K, sometimes labelled 'extra warm white'. It's warmer and more amber-toned than a standard 3000K warm white bulb, closer to the glow of an old-style halogen or incandescent lamp.

What does CRI80 mean?

CRI (Colour Rendering Index) measures how accurately a light source shows true colours compared with natural daylight. CRI80 is a good, professional-grade standard that renders skin tones, fabrics and furnishings more naturally than many budget LED bulbs.

How long is this bulb guaranteed for?

It carries a 5 year manufacturer warranty, alongside a 25,000 hour rated life.

Technical specification

More GU10 bulbs

• Sylvania LED GU10 Bulb, 350 Lumen, Cool White, B Rated
• Sylvania LED GU10 Bulb, 360 Lumen, Cool White, A Rated
• Shop the full GU10 Bulb collection