Which bulb fitting do I need?

Written by: Jon Duffy



Time to read 1 min

Blown a bulb? Thinking of switching to LED lighting? Want to add smart control to your lights? Whatever your reason for searching for a new bulb, explore our range of lightbulbs here at Maplin to find exactly what you’re looking for. It’s important to know what size fitting you need for the bulbs you’re replacing. If you’re not sure what you need, check out our handy guide to buying the best bulb for you.

E14 light bulb fittings at Maplin

E27 light bulb fittings at Maplin

E14 / E27

Also known as Edison caps, E14 and E27 bulb fittings resemble a screw shape with the number referring to the diameter of the fitting. This means E14 fittings are thinner than E27, but still have the distinctive screw shape.

Shop E14 bulbs

Shop E27 bulbs

B22 light bulb fittings at Maplin


Bayonet bulbs use a twist and lock motion to install. Unlike the Edison caps, they instead feature two prongs on either side. Widely used in most UK homes, you simply need to push and twist the bulb to connect it.

Shop B22 bulbs

GU10 light bulb fittings at Maplin


GU10 bulbs are commonly used for spotlights or downlights in kitchens or bathrooms. They connect via two pins on the base of the bulb. Suitable for both domestic and commercial use, they feature tiny glass surfaces on the inside that help to bounce light around the room.

Shop GU10 bulbs

The simplest way to check what size fitting you need is to look at the bulb you’re replacing. Most of them will include the fitting type somewhere on the underside of the bulb.

If you’re still uncertain, or simply want to explore the full range, click here to check out all our light bulbs.

About the author

Jon Duffy is a Digital Merchandiser at Maplin.

An avid gamer from a young age, Jon has dabbled in gaming journalism and dedicates much of his spare time to this hobby. He also has an interest in music, playing bass guitar in a rock covers band.

Having previously worked as a copywriter with another electronics retailer, he was eager to join Maplin with their new online venture. In addition to writing blogs, Jon also works on many of the website's landing pages and adding new tech to the range.