B22 (BC) LED Golf Bulb 4.2W 470lm Dimmable - Warm White 2700K

This golf ball bulb has a B22 bayonet cap, the push and twist fitting found on most UK pendants, wall lights and ceiling roses. It draws 4.2W and gives 470 lumens of 2700K warm white light, and the pack gives it as a 40W replacement, so it is a straight swap for the older 40W golf balls. The outer is white rather than clear, and a white outer spreads light more evenly across its surface than a clear one. Golf ball bulbs are smaller than a standard household bulb, which is what makes them useful where space around the lamp is tight.

It suits multi-arm fittings and small shades where a full sized bulb would sit proud or press against the fabric. Bedside lamps, hallway pendants, wall lights and small chandeliers are its usual homes. At 2700K the light is the warm, slightly yellow tone people know from old filament bulbs, which is why it sits comfortably in living rooms and bedrooms rather than a workshop or a utility room. If you are replacing one bulb in a fitting that holds several, match the colour temperature across all of them, otherwise the difference between warm white and cool white shows up immediately.

It is dimmable, so it will run on a dimmer circuit, though a dimmer made for filament bulbs may not behave smoothly on a load as small as 4.2W, and a dimmer rated for LED is the safer choice. The energy rating is E. The pack prints a 15 year lifespan, based on 15,000 hours of use. Each box holds one bulb, and the minimum order is 12, sold in multiples of 12, which makes it sensible for a house full of fittings or a landlord keeping spares. Our wider range includes B15 (SBC) LED candle bulbs at 4.2W and 7.3W.

Will this fit my existing bayonet light fitting?

Yes, if the old bulb had two small pins on the side of a metal cap and pushed in with a quarter turn. That is a B22 bayonet, the same cap this bulb carries.

How bright is 4.2W next to the bulb I am taking out?

It produces 470 lumens, and the pack gives it as a replacement for a 40W golf ball bulb, so the light output should feel much the same as the one you are removing.

Can I use it on a dimmer switch?

It is dimmable. Older dimmers built for filament loads often need far more wattage than 4.2W to run steadily, so a dimmer rated for LED gives the smoothest result.

What does 2700K warm white actually look like?

It is the soft, slightly golden light of a traditional filament bulb, comfortable in the evening and kinder to skin tones and warm paint colours than a whiter light.

How many bulbs do I receive?

Each box holds a single bulb. The minimum order on this listing is 12 units, sold in multiples of 12, so you would receive 12 individually boxed bulbs.