Energizer GLS E27 13.5W Opal Non-Dimmable - Warm White 2700K

This is a 13.5W LED GLS bulb with an E27 screw cap, the size often listed as ES or Edison Screw. It puts out 1521 lumens at 2700K, which the pack sets against a 100W incandescent bulb, so it is one of the brighter warm white options for a standard screw fitting. The GLS shape is the familiar rounded pear outline, and the white diffusing body spreads light broadly instead of throwing it forward in a beam.

An E27 cap turns up all over the house, on pendant flexes, ceiling roses, larger table lamps and floor lamps. If you are not sure what you have, take the old bulb out and look at the base: E27 measures 27mm across the thread, while E14 measures 14mm and looks clearly smaller. At this brightness the bulb suits rooms where you want one light source to do the work, a kitchen ceiling, a hallway or a landing. The 240 degree beam angle means light leaves the bulb in almost every direction, so it works well inside a shade or a fabric drum where you want a wash of light rather than a pool. Warm white at 2700K is the yellow-leaning tone people associate with older filament bulbs, comfortable in living rooms and bedrooms.

There is no dimming on this one: the specification and the pack both mark it non-dimmable, so pair it with a plain on or off switch and keep dimmer circuits for a bulb rated for them. The energy label puts it in class E at 14kWh per 1000 hours, and the pack prints a 15 year lifespan. Each unit is a single bulb in a blister pack, and the minimum order is 10, sold in multiples of 10. It sits alongside our wider range of LED bulbs in other fittings, including B15 (SBC) candle and golf bulbs, GU10 spots and 2G11 PLL tubes.

How do I know if my light takes an E27 bulb?

Take the old bulb out and look at the screw cap. An E27 thread measures 27mm across, while the smaller E14 measures 14mm, so the two are easy to tell apart by eye.

How bright is 1521 lumens in a real room?

The pack rates it as a 100W replacement, which makes it a main light rather than a background one, bright enough to light a kitchen ceiling or a hallway from a single fitting.

Can I put this on a dimmer switch?

No. The specification and the pack both mark it non-dimmable, so fit it on a plain on or off circuit and choose a dimmable bulb for a dimmed one.

What does 2700K warm white look like next to a daylight bulb?

It reads yellow and soft, close to the tone of an old filament bulb. Daylight bulbs at 6000K and above look blue-white by comparison and feel much cooler in a room.

Will the light spread evenly inside a shade?

The 240 degree beam angle sends light out sideways and downwards as well as forwards, so a fabric or drum shade fills rather than showing a single bright hotspot.

How many bulbs do I actually receive?

One bulb per blister pack. The minimum order on this listing is 10 units, sold in multiples of 10, so you receive ten single-bulb packs at a time.