E27 (ES) LED Bulb 13.6W 1521lm Non-Dimmable - Warm White 2700K

This is a 13.6W LED bulb with an E27 screw cap and the familiar GLS pear shape, finished in frosted white so the light spreads rather than showing the diodes as bright points. It puts out 1,521 lumens at 2700K, which the pack sells as a 100W replacement, and that is a fair reading: it is one of the brighter screw fit LED bulbs made for a domestic fitting. The frosted envelope earns its place at this output, because a clear bulb of the same brightness is uncomfortable to sit near.

E27 is the larger of the two screw caps used in the UK, so check the old bulb before you order: a thread about 27mm across is E27, and a narrower one is E14. This suits the fittings that used to hold a 100W incandescent, so a ceiling pendant in a living room, a floor lamp beside a sofa, a kitchen ceiling rose, or a landing where one bulb does all the work. Warm white at 2700K keeps the soft yellow cast of old filament lighting rather than the blue edge of a daylight lamp, so it sits comfortably with wood, brass and warm paint.

It is not dimmable, so keep it off a dimmer circuit: a non dimmable LED on a dimmer tends to flicker or buzz instead of fading. The energy rating is E, and the label puts consumption at 14kWh per 1,000 hours. The pack prints a 25,000 hour life and instant start, which means full brightness the moment the switch is flicked. Each unit is one boxed bulb, and the minimum order is 10, sold in multiples of 10. It sits alongside a dimmable B15 candle bulb in the same warm white 2700K, if you want one tone across different fittings.

My old bulb pushes in and twists. Will this one fit?

No. That is a bayonet cap, and this is an E27 screw cap that threads in clockwise. Check the base of the old bulb for a screw thread roughly 27mm across before ordering.

How bright is 1,521 lumens in a normal room?

It is bright enough to light an average living room or kitchen from a single central fitting, and it is the output people expect from the old 100W incandescent bulbs rather than a 60W one.

Can I use it on a dimmer switch?

No, this bulb is not dimmable. On a dimmer circuit a non dimmable LED will usually flicker, buzz or refuse to switch on properly, so wire it to a plain on and off switch.

Is an IP rating given for this bulb?

The manufacturer does not print one on the pack or state one in the specification, so treat it as an ordinary lamp for dry indoor fittings and nothing more demanding.

Why does the box say 100W when the bulb draws 13.6W?

The 100W figure is the old filament bulb it replaces for brightness. The 13.6W is what it actually consumes, which is why the energy label rates it at 14kWh per 1,000 hours.

Does it come on at full brightness straight away?

Yes. The pack prints instant start, so there is none of the slow warm up that older compact fluorescent bulbs needed before reaching their stated output.