E27 LED Filament Golf Bulb 4W 470lm - Warm White 2700K - Energizer

This is a golf ball bulb with an E27 screw cap, the larger of the two common screw fittings, and it draws 4W to give 470 lumens. The pack rates it as a replacement for a 40W incandescent bulb. Inside the clear glass sit slim LED filaments arranged in a cage, which is why a bulb of this kind looks right in a fitting where the lamp itself is on show. The light is warm white at 2700K, the yellow leaning tone most people associate with an old filament lamp.

A golf ball bulb is the small round shape, roughly the size of its namesake, so it suits fittings where a full size GLS bulb would look oversized: bedside lamps, small pendants, wall lights and chandeliers with E27 holders. At 470 lumens this is a companionable light rather than a main working light, so a pair in a living room or on a landing reads as soft background lighting. Clear glass puts the filaments on show, so it earns its place in an open shade, a bare flex pendant or a glass holder, where a frosted bulb would give you nothing to look at.

There is no dimming here: the specification and the pack both mark it as non-dimmable, so put it on a plain on and off switch rather than a dimmer, which can make a non-dimmable lamp flicker or buzz. The energy rating is E, and the pack prints a 15 year lifespan based on 15,000 hours of use. Each box holds a single bulb and the minimum order is 12, sold in multiples of 12, which suits kitting out a run of fittings or keeping spares for a rental property. Other LED bulbs on our shelves include B15 (SBC) candle bulbs and GU10 lamps, if the rest of your fittings take a different cap.

How do I know my lamp takes an E27 cap?

E27 is the larger screw cap, about 27mm across the threads. Unscrew the old bulb and compare: the smaller screw cap, roughly 14mm, is E14 and will not fit this holder.

How bright is 470 lumens in a real room?

It is close to an old 40W incandescent bulb. That is comfortable for a bedside lamp, a hall pendant or a multi arm fitting, but thin as the only light in a large room.

Can I put it on a dimmer switch?

No. It is marked non-dimmable on both the pack and the specification, so it needs a normal on and off switch. On a dimmer it may flicker, buzz or fail early.

What does 2700K warm white actually look like?

It is a soft yellow leaning light, the tone people remember from tungsten bulbs. It flatters wood, brick and warm paint colours, and it suits evening rooms better than a cooler 4000K bulb.

Is an IP rating given for this bulb?

No. Neither the specification nor the retail pack prints an IP rating, so we state none for it. Treat it as an ordinary indoor lamp for enclosed or open dry fittings.

How many bulbs do I receive?

One bulb per box. The minimum order on this listing is 12 boxes, sold in multiples of 12, so a single order brings you twelve separate bulbs.