E27 (ES) LED Golf Bulb 4.2W 470lm Non-Dimmable - Warm White 2700K

This is a golf ball lamp, the small round bulb about the size of a real golf ball, with an E27 screw cap and an opal white finish. It draws 4.2W and gives 470 lumens, which the pack states is a replacement for a 40W filament bulb. The light is warm white at 2700K, the yellow toned white most people think of as ordinary household light. LED technology means it reaches full output the moment you switch it on, with no warm up period, and the frosted shell softens the diodes behind it so the light does not show as bright points.

An E27 cap is the larger of the two screw sizes used in the UK, so check the old bulb: E27 threads measure 27mm across the metal base, while the smaller E14 measures 14mm. The golf shape suits fittings where a full size GLS bulb looks bulky or simply will not fit: bedside lamps, small pendants, wall lights with narrow shades, and multi arm fittings where several bulbs sit close together. With a 140 degree beam angle the light spreads broadly rather than pooling in one direction, so it works as general room light rather than a reading spot.

There is no dimming here: the specification and the pack both mark it non dimmable, so put it on a plain on/off switch rather than a dimmer circuit, which can cause flicker or buzzing. The energy rating is E, and the pack prints a 15 year lifespan based on 15,000 hours of use. It carries an IP20 rating, which means it is made for dry indoor fittings. Each box holds one bulb, and the minimum order is 12, sold in multiples of 12. We also list the same 4.2W 470lm golf lamp with a B15 (SBC) cap if you need the small bayonet version.

Which fittings take an E27 bulb?

E27 is the larger screw cap, 27mm across the threads, used on most standard table lamps, pendants and floor lamps. Unscrew the old bulb and measure the metal base if you are unsure, because the smaller screw cap is E14 at 14mm.

Is 470 lumens bright enough to replace an old 40W bulb?

Yes. The pack states this 4.2W lamp as a 40W replacement, and 470 lumens is the usual output for that swap, so a bedside or side table lamp will read much as it did before.

Can I put it on a dimmer switch?

No. Both the specification and the pack mark it non dimmable, so wire it to a plain on/off switch. Fitting a non dimmable lamp to a dimmer circuit can cause flicker, buzzing or an early failure.

What does 2700K warm white look like in a room?

It is the soft yellow toned white of a traditional filament bulb, comfortable in living rooms and bedrooms. If you want a crisper, whiter light for a kitchen or workspace, look at 4000K instead.

Will it suit a small shade or a multi arm fitting?

The golf shape is noticeably shorter and narrower than a standard GLS bulb, so it sits well inside clip on shades, narrow wall lights and chandeliers where several lamps are close together.

How long should one bulb last?

The pack prints a 15 year lifespan, based on 15,000 hours of use. That figure assumes typical household hours per day, so heavy daily use will work through it faster.