How to find the right GU10 globes for your downlights and spotlights

GU10 bulbs are a popular choice for downlights and spotlights, offering a powerful and versatile lighting solution. But with so many options available, choosing the right GU10 bulb can feel overwhelming. This guide will shed light on everything you need to consider to find the perfect fit for your needs.

Table of Contents

Step 1: Understanding the Basics of GU10 Bulbs

What Are GU10 Lights?

GU10 is the base type and is a common type of bulb base for spotlights. It features two pins spaced 10mm apart that twist and lock into the fixture for a secure fit. The "GU" stands for general use, and the "10" refers to the distance between the pins.

Base Type

GU10 refers to the base type.

LED vs. Halogen

Traditionally, GU10 bulbs came in halogen. However, LED options are now dominant due to their energy efficiency and longer lifespan. LED bulbs are taking over for their impressive efficiency, resulting in lower energy bills. Additionally, they generate minimal heat compared to halogens, making them safer and longer-lasting, so you'll save money on both electricity and replacements.

gu10 globes

Step 2: Choosing the Right Specifications

Lumens vs Wattage

Lumens measure the brightness of the bulb. Wattage indicates the amount of power consumed by the bulb to produce light. Lumens are the true measure of brightness. A higher lumen value indicates a brighter bulb. For reference, a 4.5W LED GU10 can provide the equivalent brightness of a 50W halogen bulb.

Beam Angle

This determines how wide the light spreads. Narrower angles (around 20 degrees) are ideal for highlighting objects, while wider angles (around 40 degrees) suit general room lighting.

Colour Temperature

Colour temperature determines the warmth or coolness of the light emitted by the bulb. It is measured in Kelvin (K). Lower Kelvin values (2700K-3000K) produce warm white light suitable for creating a cosy atmosphere in living spaces, while higher Kelvin values (4000K-5000K) produce cool white light ideal for task lighting in kitchens and bathrooms.

Step 3: Additional Considerations


If you plan to install your GU10 bulbs with dimmer switches, ensure that they are compatible with dimmable fixtures. Not all LED bulbs are dimmable, so check the product specifications before purchasing.

Colour Rendering Index (CRI)

CRI measures the ability of a light source to accurately render colours. Look for GU10 bulbs with a high CRI (80 or above) for optimal colour representation, particularly in areas where colour accuracy is important, such as art studios or retail spaces.

Step 4: Buy the right bulb and quantity

Consider the above factors and specifications to choose the right GU10 bulb for your space. As with quantity, start with one downlight per square metre of space. If your lights are bright and spread light well (wide beam angles), you can space them further apart - up to 2 metres. Just try to arrange them in a grid pattern as much as possible, but don't worry about being perfect - adjust to fit your room.

Our GU10 LED Products Range

Longer Length (>60mm) Shorter Length (<60mm)