E27 (ES) LED GLS Bulb 13.8W 1521lm - Warm White 3000K, 6 Pack

This is a GLS bulb, the familiar pear shape most household fittings were built around, with an E27 screw cap and an opal rather than clear casing. It draws 13.8W and gives 1521 lumens of warm white light at 3000K, which the retail pack rates as a 100W conversion. The opal finish does real work: it spreads the light coming off the diodes so the bulb reads as one soft source rather than several bright points, which matters in an open shade where the lamp is on show. One listing brings six bulbs, five plus one extra.

E27 is the larger of the two screw caps in common UK use, with a thread 27mm across, so the fastest check is the bulb you are taking out: if it screws in but sits noticeably narrower, that is an E14 and this one will not fit. At 1521 lumens the output is generous for a single lamp, so put it where a room needs to be genuinely bright. A kitchen pendant, a hallway or landing shade, a standard lamp beside a reading chair or a workshop lamp over a bench all suit it well.

3000K reads as a clean warm white: warmer than office lighting, but a step back from the deep amber of an old filament lamp, so it flatters wood and brick without turning whites yellow. Mix it with other warm white lamps rather than 6500K daylight ones in the same room. The manufacturer does not state whether this bulb can be dimmed, so where you have a dimmer switch a lamp confirmed as dimmable is the safer buy. Six bulbs per pack, minimum order one pack, which suits relamping a landing or a run of pendants in one go. It sits alongside our wider range of LED bulbs, including B15 candle and golf lamps and a 7W E27 GLS filament in warm white.

Will this fit my existing light fitting?

It has an E27 screw cap, also written ES, which is the larger of the two screw fittings used in UK homes and measures 27mm across the thread. The smaller E14 or SES cap will not fit.

How bright is 1521 lumens in a real room?

That is enough for a main ceiling light in most rooms rather than a gentle side lamp. The retail pack rates the bulb as a 100W conversion, so it suits any position where a high wattage lamp used to sit.

What does 3000K warm white actually look like?

A soft white with a little warmth in it, gentler than the cooler light of an office or a shop, but cleaner than the deep amber of a traditional filament lamp. Whites still read as white.

Can I use it on a dimmer switch?

The manufacturer does not state whether this bulb can be dimmed, so we make no claim either way. On a dimmer circuit, choose a lamp that states it is dimmable; on an ordinary switch the question does not arise.

How many bulbs do I get, and can I buy just one pack?

Each pack holds six bulbs, sold as five plus one extra, with every bulb in its own carton inside the outer sleeve. The minimum order is one pack and you can buy in multiples of one.

Will I see bright dots through an open shade?

The casing is opal rather than clear glass, which spreads the output so the bulb reads as a single soft source. That makes it a comfortable choice for pendants and shades that leave the lamp visible.