B22 (BC) LED GLS Bulb 13W 1521lm Dimmable - Warm White 2700K

This is a bayonet cap LED GLS bulb that can be set to three different whites. It takes a B22 fitting, the push-and-twist bayonet cap found on most British ceiling pendants and table lamps, and it draws 13W to give 1521 lumens. The pack rates that as a 100W replacement, which puts it at the bright end of what a standard household bulb gives. A switch on the body of the lamp moves it between 2700K warm white, 4000K cool white and 6500K daylight, and the bulb is dimmable. The energy class printed on the pack is E.

One bulb covering three colour temperatures is useful where the same room does two jobs. In a living room, 2700K gives the soft yellow light people expect from an evening lamp; 4000K is a cleaner, more neutral white that suits a kitchen, a landing or a home office; 6500K is a crisp daylight tone that helps with close work such as sewing, model making or reading small print. Because the GLS shape is the familiar pear-shaped household bulb, it sits properly under a shade and behaves like the bulb it replaces rather than making you rethink the fitting.

The colour is chosen on the bulb itself rather than at the wall, so set it before you fit the shade and let the wall switch carry on doing its usual job. Dimming needs a dimmer rated for LED loads; older mains dimmers built for filament bulbs often hum or flicker with a low wattage lamp. The pack prints a 15,000 hour lifespan, described there as 15 years. Each box holds one bulb, and the minimum order is 12, sold in multiples of 12, which suits anyone fitting out a whole house or keeping a few spares in the cupboard.

How do I tell whether my lamp takes a B22 cap?

Look at the base of the old bulb. A B22 bayonet cap is smooth with two small pins on the sides and pushes in then twists; a screw cap has a thread instead.

How do I change between the three colour temperatures?

A small switch on the body of the lamp selects 2700K, 4000K or 6500K. Set it before you fit a shade, because you need to reach the bulb to move it.

Will it work on my dimmer switch?

It is dimmable, but use a dimmer rated for LED loads. Older dimmers designed for filament bulbs can buzz or flicker because a 13W lamp draws far less than they expect.

How bright is it compared with the bulb I am replacing?

It gives 1521 lumens and the pack rates it as a 100W replacement, so it is bright enough for a main ceiling light in a living room or kitchen.

Is an IP rating printed on the pack?

No IP figure is printed on the pack or given in the specification, so treat it as an ordinary indoor bulb for dry, enclosed locations only.

How many bulbs do I receive?

Each box contains one bulb. The minimum order on this listing is 12 boxes, sold in multiples of 12, so you receive twelve bulbs at a time.