Energizer Squirrel Cage E27 Filament Dimmable - Very Warm White 2200K

This is a 5W LED filament bulb with an E27 screw cap and the tall, tapered ST64 teardrop shape that suits open fittings. The glass is tinted gold, so the bulb reads as a warm amber even before it is switched on, and the LED filaments inside sit in a slim upright arrangement that stays part of the look once it is lit. It gives 550 lumens at 2,200K, a deep candle-like warm white rather than the brighter 2700K that most household bulbs use, and the retail pack rates it as a 40W replacement.

Because the filaments are the point of a lamp like this, put it where they can be seen: a pendant hung without a shade, an open cage or lantern, a wall bracket that leaves the glass exposed, or a table lamp with a shallow shade that shows the bulb from below. The 320 degree beam spreads light all round rather than pushing it one way, so it behaves as ambient light in a hallway, over a dining table or in a snug. The amber tint keeps the output low and restful, which suits evening rooms, bars and bedside pendants far better than a room where you need to work.

It is dimmable, so pair it with a trailing-edge LED dimmer and check the dimmer's minimum load: older mains dimmers designed for filament bulbs often need more wattage on the circuit than a single 5W LED can draw. The pack prints a 15 year lifespan based on 15,000 hours of use, and the energy rating is E. Each unit is one bulb in its own box, with a minimum order of 12. It sits alongside our wider range of LED bulbs in B15 (SBC), GU10 and E27 fittings.

Which fittings will take this bulb?

Any fitting with an E27 screw socket, also called Edison screw or ES. Unscrew the old bulb and check the cap is a threaded screw roughly 27mm across rather than a two-pin bayonet push and twist.

Will it work on my dimmer switch?

It is dimmable, and a trailing-edge LED dimmer gives the smoothest result. Check the dimmer's minimum load, because a single 5W lamp on a dimmer built for old filament bulbs may flicker or refuse to strike.

How bright is 550 lumens in practice?

The pack calls it a 40W replacement, so think of a traditional 40W bulb. That is comfortable for a pendant over a table or a lamp beside a chair, rather than the only light in a large room.

What does 2,200K look like once it is on?

Much warmer and more amber than a standard 2700K warm white, close to candlelight. Combined with the gold tinted glass it gives a low, golden glow rather than a clean white light.

Is an IP rating given for this bulb?

No. The manufacturer does not state an IP rating, so treat it as a lamp for ordinary dry indoor fittings and nothing more demanding than that.

How many do I receive, and how long should one last?

Each unit is a single boxed bulb, with a minimum order of 12 sold in multiples of 12. The pack prints a 15 year lifespan based on 15,000 hours of use.