G9 LED Bulb 4.2W 470lm Non-Dimmable - Cool White 4000K, 2 Pack

This is a G9 capsule LED, the small two-pin lamp that pushes straight into its holder rather than twisting or screwing in. It draws 4.2W and gives 470 lumens at 4000K, a cool white with a clean, crisp cast rather than the yellow of a traditional filament. The pack gives it as a replacement for a 40W lamp. The body is clear, with rows of LED chips running up a ribbed capsule and two wire pins looped below, so it reads as a tidy point of light inside an open fitting. It arrives as a box of two.

G9 holders turn up in multi-arm pendants, small wall lights, picture lights and under-cabinet fittings, where the housing is built around a lamp barely bigger than a thumbnail. Because the cap is a push fit rather than a screw, the lamp sits at a fixed depth, so it is worth measuring the space inside your shade or glass before ordering, as capsule lamps vary in length. Cool white at 4000K suits kitchens, workshops, home offices and hallways, anywhere you want light that shows colours and edges clearly rather than softening the room.

This lamp is not dimmable. The specification says so and the pack carries the non-dimmable mark, so it wants a plain on/off switch; fitted to a dimmer, a non-dimming LED can flicker, buzz or fail early, and on a multi-lamp fitting every lamp on the circuit has to be dimmable for dimming to work at all. The pack prints a 15 year lifespan and a 15,000 hour rated life, and the energy rating is class E. You receive two bulbs in a box, and the listing is sold in multiples of twelve, which suits keeping spares for a fitting that carries several lamps at once. It sits alongside our wider range of Energizer LED bulbs in other caps, including B15 (SBC) candle bulbs and a GU10 spotlight.

Will this fit my existing G9 holder?

Yes, if the old lamp has two straight wire pins that push into the holder. G9 is a push fit cap, so there is no twist or screw action when you seat it.

How bright is 470 lumens in practice?

It is the brightness the pack gives as a 40W replacement, so a fitting that took 40W capsules should look much the same once these are in.

Can I use these on a dimmer switch?

No. Both the specification and the pack give this lamp as non-dimmable, so it needs a standard on/off switch rather than a dimmer circuit.

What does 4000K cool white actually look like?

It is a neutral, slightly crisp white, brighter in feel than a 2700K warm white and easier for task light over worktops, benches and desks.

Does the manufacturer state a length or an IP rating?

Neither figure is stated for this lamp, so measure your old capsule and the space in the fitting before you order a replacement.

How many bulbs do I get?

Each box holds two bulbs, and this listing is ordered in multiples of twelve boxes, which gives you twenty four bulbs at the minimum order.