Energizer LED GLS Bulb E27 24.9W Opal Non-Dimmable - Daylight 6500K

An E27 screw cap LED bulb in the classic GLS shape, this one is built for output: 24.9W drawing 3452 lumens at 6500K daylight. The retail pack rates it as a 200W replacement, which is well beyond the brightest bulb most households buy. GLS is the rounded, gently tapered form that has lit British homes for decades, so it sits in existing pendants and lamp holders without looking out of place. The body is white rather than clear glass, so the light spreads around the room instead of picking out a bright point at the centre.

With this much light from one lamp, it earns its place where a single ceiling point has to cover a lot of floor: a garage, a workshop, a utility room, a big open kitchen or a hallway with a tall stairwell. 6500K daylight sits at the cool end of the white scale, a crisp blue leaning white rather than the yellow of an old filament bulb, and it suits benches, work surfaces and any job where you need to judge colour and fine detail. It is a less natural choice for a bedroom or a sitting room in the evening, where warm white nearer 2700K reads as more restful. Check that your shade or enclosure gives the lamp a little room around it.

The specification lists it as non dimmable, so run it from an ordinary on or off switch and keep it off a dimmer circuit, where a non dimming LED can buzz, flicker or fail early. The energy rating is D. The pack prints a 15 year lifespan and 15,000 hours of use. Each box holds one bulb, and the minimum order is 12, sold in multiples of 12, which suits kitting out a whole property or keeping spares on a shelf. It sits alongside our wider range of LED bulbs in E27, B15 and GU10 fittings.

Will this fit my existing light fitting?

It takes an E27 cap, the larger of the two screw fittings used in the UK, also written as ES. Unscrew your old bulb and check the base is a threaded screw around 27mm across rather than a push and twist bayonet.

How bright is 3452 lumens in a normal room?

Very bright for a single lamp. The pack calls it a 200W replacement, so it gives roughly double the output of the 100W style bulbs many people remember, which is why it suits garages, workshops and large open rooms more than a small bedroom.

Can I use it on a dimmer switch?

No. The specification lists it as non dimmable, so it should run from a standard on or off switch. Fitting a non dimming LED to a dimmer circuit can cause buzzing, flicker or early failure, and it will not dim smoothly.

What does 6500K daylight actually look like?

It is a crisp, blue leaning white, the coolest of the common white tones. Colours and fine detail read clearly under it, which is useful over a bench or worktop, but it feels brisk rather than cosy in a living room at night.

How long is it meant to last?

The retail pack prints a 15 year lifespan and 15,000 hours of use. Real life will depend on how many hours a day it runs and how well ventilated the fitting it sits in happens to be.

How many bulbs do I get for the price shown?

Each box contains one bulb, so the price is per lamp. The minimum order on this line is 12, sold in multiples of 12, which works out well if you are fitting out a property or holding spares.