B22 (BC) LED GLS Bulb 9.5W 1050lm Non-Dimmable - Cool White 4000K

This is a standard GLS bulb, the familiar rounded pear shape that most British ceiling pendants and table lamps were built around, fitted with a B22 bayonet cap. It draws 9.5W and gives 1050 lumens, and the pack rates it as a replacement for a 75W incandescent bulb, so it is one of the brighter LED options on a bayonet fitting. The glass is opal white rather than clear, which spreads the light and keeps the source out of direct view behind a bare shade. Its colour temperature is 4000K, a cool white that sits between the yellow of an old filament lamp and full daylight.

Cool white at 4000K is the light most people want where they are doing something rather than relaxing: kitchens, utility rooms, garages, workshops, home offices, stairwells and hallways. It renders whites as white and keeps worktops and paperwork looking crisp, where a 2700K warm white in the same fitting would read amber and soften the detail. In a living room or a bedroom most buyers prefer the warmer figure, so it is worth deciding room by room rather than buying one temperature for the whole house. The opal finish makes it forgiving in an open pendant, a fabric drum shade or an uplighter where the bulb is partly visible.

This bulb is not dimmable, so check the circuit before ordering: on a dimmer it may flicker, buzz or refuse to light, and a plain on and off switch is what it wants. The energy rating is E, and the pack prints a 15 year lifespan. Each unit is a box of one bulb, and the minimum order is 12, sold in multiples of 12, which suits stocking up for a house or a rental. It sits alongside our wider range of LED bulbs, which also runs to B15 candle and golf shapes and GU10 spots.

How do I know if my light fitting takes a B22 cap?

A B22 cap has a smooth metal base with two small pins on the sides, and it pushes in and turns a quarter twist rather than screwing in like an E27. Compare the old bulb with the socket before you order.

What does 4000K cool white actually look like in a room?

It reads as a neutral white with no yellow cast and no blue edge, much like the light in a shop or an office. Warm white at 2700K looks noticeably yellower, and 6500K daylight looks colder again.

Can I put this on a dimmer switch?

No. The specification lists it as non dimmable, so on a dimmer circuit you may get flicker, buzzing or no light at all. Choose a dimmable lamp where the room is on a dimmer.

Which old bulb does this replace?

The retail pack rates it as a 75W replacement, and at 1050 lumens it is bright enough to light a single central pendant in an average sized room on its own.

How many bulbs do I receive, and what is the minimum order?

Each unit is a box containing one bulb. The minimum order is 12 units, sold in multiples of 12, so the smallest purchase brings you twelve individually boxed bulbs.

Is an IP rating stated for this bulb?

The manufacturer does not state an IP rating for this bulb, so the specification above carries no IP row. Use it in ordinary indoor pendants, shades and table lamps.