Energizer 4.9W GU10 LED Bulb 3000K Warm White Non-Dimmable - 4 Pack

The Energizer 4.9W GU10 LED bulb produces 345 lumens of warm white 3000K light from a standard GU10 twist-and-lock fitting, acting as a direct replacement for 50W halogen spotlights. Each bulb draws 4.9W on mains power and carries an energy rating of F under the revised EU energy label scale, which repositioned most LED bulbs from A+ to D-G following tighter efficiency thresholds introduced in 2021.

Designed for recessed downlights, track lighting and spotlight fittings in kitchens, hallways, bathrooms and living rooms, the bulbs deliver a 38° beam angle that concentrates light into a moderately narrow cone rather than flooding a wide area. The non-dimmable design means the bulbs operate at full 345 lumens when switched on and should not be paired with dimmer switches. The warm white 3000K colour temperature sits between the neutral tone of halogen and the cooler white of daylight LEDs, giving a slightly amber-tinted glow that softens under evening ambient lighting.

Each bulb measures 50mm diameter by 54mm height, matching the compact profile of the halogen GU10s they replace, so they fit flush in most recessed housings without protruding below the ceiling line. The pack of four suits multi-bulb installations where several downlights are being replaced in a single room or across adjacent rooms on the same shopping trip. Energizer rates the bulbs at 15,000 hours average lifespan, which translates to approximately 13 years at 3 hours per day use.

Are these bulbs dimmable?

No. These are non-dimmable LEDs and should not be installed on circuits controlled by dimmer switches. Pairing non-dimmable LEDs with dimmers can cause flickering, buzzing or premature failure.

What's the colour temperature like compared to halogen?

At 3000K these Energizer bulbs produce a warm white tone slightly cooler than traditional 2700K halogen. The light appears faintly less amber and slightly crisper, though still warm enough to suit residential interiors where a cosy ambiance is wanted.

Will they fit my existing GU10 downlight housings?

Yes. The 50mm diameter and 54mm height match standard halogen GU10 dimensions, so the bulbs fit flush in most recessed downlight housings without protruding below the ceiling trim.

What does the 38° beam angle mean in practice?

A 38° beam angle concentrates light into a moderately narrow cone, suitable for task lighting over worktops or accent lighting on specific features. It's narrower than a 60° flood but wider than a 24° spot, so it provides useful directed light without creating harsh shadows.