E27 (ES) LED GLS Bulb 12.6W 1521lm Dimmable - Warm White 2700K

A GLS bulb is the familiar pear shape that has sat in household pendants for decades, and this one carries that shape on an E27 screw cap with LED inside. It runs at 12.6W and puts out 1521lm, a figure the retail pack gives as a 100W replacement, so it sits at the bright end of what a single screw-fit LED bulb will do. The colour temperature is 2700K warm white, the yellow-leaning tone of the old incandescent bulbs rather than the crisper white of a 4000K lamp, and this version is dimmable.

E27 is the larger of the two screw caps in common UK use, the one often printed as ES. If you are replacing an old bulb, look at the base before you order: a wide screw thread roughly the diameter of a ten pence piece is E27, while the narrower screw cap is E14. With this much output behind it, the bulb earns its place as the main light in a living room, a kitchen ceiling fitting or a tall standard lamp, where a dimmer lets you pull it back for the evening. In a small hallway lantern or a bedside lamp it may well be more light than you want.

Dimming an LED is not the same job as dimming a filament bulb. Older dimmers were built for a far heavier load, and at 12.6W this lamp sits below what many of them expect, so a trailing edge dimmer marked as LED compatible gives the smoothest run down to the low settings. The pack prints a 15,000 hour life, described there as a 15 year lifespan, and an E energy class. Each box holds one bulb, and the minimum order is 12. Other LED bulbs we stock include B15 (SBC) candle bulbs and GU10 bulbs.

How do I tell whether my fitting takes an E27 bulb?

Take the old bulb out and look at the base. E27 is a screw thread about 27mm across, roughly a ten pence piece; the slimmer screw cap is E14, and a push and twist base is bayonet, which will not accept this bulb.

What sort of dimmer should I use with it?

A trailing edge dimmer described by its maker as LED compatible is the usual choice. At 12.6W the load is small, so an old dimmer built for filament bulbs may hum, flicker at the bottom of its travel or refuse to strike at all.

How bright is 1521 lumens in a normal room?

It is the output the pack equates to a 100W incandescent bulb, so it will comfortably light a medium living room or kitchen from a single central pendant rather than acting as a soft background lamp.

What does 2700K warm white actually look like?

It is a soft, yellow-leaning white, the tone most people remember from incandescent bulbs. Lamps at 4000K or 6500K look noticeably whiter and cooler, so keep a room to one colour temperature if you can.

Does the manufacturer state an IP rating?

No IP figure is given on the pack or in the specification, so nothing about ingress protection is claimed here. Treat it as an ordinary indoor lamp for enclosed or open domestic fittings.

How many do I have to order?

Each box contains one bulb, and the listing has a minimum order of 12, sold in multiples of 12, so the smallest purchase is twelve individually boxed bulbs.