Light Bulbs and Ceiling Kits: What to Know Before You Buy

Quick answer

Match the bulb cap to the ceiling kit first, then decide on brightness and dimming. For most Tom Raffield ceiling lights sold to the UK, that means an E27 screw cap, so a bulb such as the Crompton 11823 LED Light Bulb will fit the supplied ceiling kit. If you are unsure, buy the ceiling kit and bulb together rather than guessing.

Buying a ceiling light is really two purchases: the fixture and the bulb. Get the cap type wrong and the light simply will not work, no matter how good it looks in the room. This guide walks through the decisions that matter, in the order you should make them.

It is written for anyone pairing a Tom Raffield ceiling light with a bulb, or adding a ceiling kit to an existing pendant. It covers cap types, brightness, dimming, and the practical trade-offs, so you can order once and install without a second trip.

Start with the ceiling kit, not the bulb

A ceiling kit is the part that fixes to the ceiling and holds the bulb: the rose, the cable, and the lampholder. The bulb is the replaceable part that screws into it. The kit decides which caps will fit, so it is the first thing to check. If you already own a Tom Raffield pendant, look at the lampholder before shopping for bulbs.

Tom Raffield ceiling kits sold to the UK use an E27 screw cap, which is the common Edison screw size. That means a bulb like the Crompton 11823 LED Light Bulb will fit. If you are ordering a new fixture, buying the kit and the bulb together removes the guesswork entirely.

• Check the lampholder, not the shade, when confirming cap type.
• If you are buying a new fixture, add the bulb to the same order.

Bulb base types explained, briefly

Most household bulbs use one of two families: screw caps and bayonet caps. Edison screw caps are written as E followed by a number, such as E27 or E14, where the number is the diameter in millimetres. Bayonet caps are written as B followed by a number, such as B22. The two are not interchangeable without an adapter, and adapters add length that can spoil the look of an exposed bulb.

E27 is the larger screw cap and the one used across the Tom Raffield ceiling kits sold to the UK. E14 is the smaller screw cap often found on small decorative fittings. If a product page does not state the cap, treat that as a gap in the information rather than assuming a size.

• E27 and B22 are not the same fitting, even if the bulbs look similar.
• Never force a bulb into a lampholder; if it does not turn freely, it is the wrong cap.

Brightness and colour: what to look for

Brightness is measured in lumens, not watts. The Crompton 11823 LED Light Bulb produces 1,055 lumens, which is equivalent to an old 65 watt incandescent bulb. That is a useful reference point: if you are replacing a 60 to 75 watt bulb, this is in the right range. For a single pendant over a dining table, that is usually plenty; for a large room with several drops, you may want to think about the total rather than one bulb.

Colour temperature is the other half of the decision. The Crompton 11823 gives off a warm white light, which suits living and dining spaces. Warm white is generally the safer choice for wooden fixtures because it keeps the timber looking rich rather than washed out.

• Use lumens to compare brightness across bulb types.
• Warm white is the default for living and dining rooms.

Dimming, exposed bulbs, and the look you want

If you want to dim the light, both the bulb and the dimmer switch need to support it. The Crompton 11823 LED Light Bulb is dimmable, which makes it a straightforward choice for a dimmable circuit. A non-dimmable bulb on a dimmer will often flicker or buzz, so check the bulb before you assume the switch is at fault.

Some fixtures are designed to show the bulb, and that changes what you should buy. The Norden - Enno Pendant pairs an oak ceiling kit with an exposed Enno bulb, so the bulb is part of the design rather than something to hide. In that case, choose a bulb whose shape and finish you actually like, because you will see it every day.

• Match dimmable bulbs to dimmable switches.
• For exposed-bulb fixtures, treat the bulb as a design decision.

How many bulbs does your fixture need?

Multi-drop fixtures change the maths. The Linear Trio Light Long is a rectangular three-way fixture designed for multiple suspensions above a table, kitchen island, or bar counter, and it can be used with the bulbs exposed or with a lampshade on each drop. That means three bulbs, and three chances to get the cap type wrong if you order in a hurry.

The Bue - Linear Trio Light Long follows the same three-way logic, with three dome-shaped, hand-glazed earthenware lampshades that cast gentle downlighting. Because the shades soften the output, the bulb is less visible here, so you can prioritise brightness and dimming over filament styling.

• Count the drops before ordering bulbs.
• If shades cover the bulb, prioritise performance over appearance.

Decision rules for bulbs and ceiling kits

• If you do not know the cap type: Check the lampholder on the ceiling kit, not the shade. Tom Raffield ceiling kits sold to the UK use E27. When in doubt, order the kit and bulb together.
• If you want to dim the light: Choose a dimmable bulb and confirm the switch is dimmable too. The Crompton 11823 LED Light Bulb is dimmable. Flicker usually means a bulb or switch mismatch, not a faulty fitting.
• If the bulb will be visible: Fixtures like the Norden - Enno Pendant leave the bulb exposed, so pick a shape and finish you like. Style matters as much as lumens here.
• If the fixture has three drops: Fixtures such as the Linear Trio Light Long and Bue - Linear Trio Light Long need three bulbs. Count the drops before you order.
• If the shades cover the bulb: With hand-glazed shades softening the output, prioritise brightness and dimming over filament styling. Spend on performance, not appearance.

Products that answer these questions

• Crompton 11823 LED Light Bulb: A dimmable E27 LED bulb producing 1,055 lumens of warm white light, equivalent to a 65 watt incandescent bulb, and described as working well with lights such as the Urchin Pendant Light and Mullion Floor Light. It covers the three decisions at once: correct cap for UK ceiling kits, dimmable, and a brightness that suits most living and dining rooms.
• Norden - Enno Pendant: Combines a timeless oak ceiling kit with the playful Enno bulb, with an exposed bulb and a characteristic trapezoid form. A good example of a fixture where the bulb is visible, so shape and finish matter as much as brightness.
• Linear Trio Light Long: A rectangular three-way fixture designed for multiple suspensions above a table, kitchen island, or bar counter, with bulbs left exposed or a lampshade added to each drop. Shows why bulb quantity matters: three drops means three bulbs, and the shade choice changes how visible they are.
• Bue - Linear Trio Light Long: A rectangular three-way fixture with three dome-shaped, hand-glazed earthenware lampshades that cast gentle downlighting. Where shades soften the light, you can choose a bulb for output and dimming rather than for its looks.

Who this approach suits

Best for

• Buyers pairing a Tom Raffield ceiling kit with a replacement bulb
• Anyone choosing bulbs for a multi-drop fixture such as a trio pendant
• Households that want dimmable warm white light in living or dining rooms

Not for

• Fixtures that use a bayonet cap, which need a different bulb type
• Rooms where you want a cool or daylight colour temperature
• Anyone who needs a bulb specification that is not listed on the product page

Decide in this order: cap type, then dimming, then brightness and colour, then looks. Get the first two right and the rest is preference. If you are still unsure, buy the ceiling kit and bulb together and you will not have to guess.