B22 LED Filament Golf Bulb 4W 470lm - Warm White 2700K - Energizer

This is a golf ball LED bulb with a B22 bayonet cap, the push and twist fitting with two pins used by most British ceiling roses and table lamps. Inside the clear glass sit upright filament strips that light along their whole length, so the bulb reads as a small traditional lamp rather than a plastic dome. It draws 4W for 470 lumens at 2700K, and the retail pack rates it as a replacement for a 40W bulb.

A golf ball is the shape to reach for when the bulb will be seen, or when a shade is too small to take a standard GLS. It suits pendant clusters, bedside and table lamps, short wall lights and multi arm ceiling fittings where several bulbs sit together. The beam angle is 320 degrees, so light leaves the glass in almost every direction instead of being thrown forward, which is what an open shade or a fabric drum needs: some of the output goes up to the ceiling as well as down onto the table.

Dimming is not an option here: the pack marks the bulb non-dimmable, so give it a plain on/off switch and save dimmer circuits for lamps rated for them. The energy rating is E, and the IP rating is IP20, meaning no protection against water, so keep it to ordinary indoor fittings. The pack prints a 15,000 hour life, which it puts at 15 years. Each box holds one bulb; the minimum order is 12, sold in multiples of 12, which suits relamping a whole house or keeping spares in the cupboard. We also list golf and candle bulbs on the smaller B15 (SBC) cap at the same 470lm warm white output.

How do I know if my lamp takes a B22 cap?

Look at the base of the old bulb. A B22 bayonet cap is smooth metal with two small pins on the sides, and it pushes in and twists rather than screwing.

Will 470 lumens really replace my old 40W bulb?

The pack rates this 4W bulb as a 40W replacement, so expect a similar amount of light from a fraction of the power draw.

Can I put it on a dimmer switch?

No. The pack marks it non-dimmable, so wire it to a standard on/off switch and choose a dimmable lamp for any circuit with a dimmer fitted.

What does 2700K warm white actually look like?

It is the soft, slightly yellow light people associate with old tungsten bulbs, and it flatters wood, warm paint colours and evening rooms rather than work surfaces.

Will the filaments look right in a clear glass shade?

Yes. The glass is clear and the filament strips run upright through it, so the bulb is meant to be seen in open shades and bare pendants.

How many bulbs do I get for the price shown?

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