What are downlights? A guide to choosing the perfect LED solution

Downlights, also called recessed lights, are light fixtures designed to illuminate one specific item or area. They’re characterised by a narrow beam of light and are recessed into the ceiling, eliminating the need for an external light fixture on the surface. In some cases, they’ve even been used as replacements for table lamps. Downlights are often used as spotlights or used in areas where you need an additional amount of light for task illumination. They’re one of the most popular types of ceiling lights in kitchens as a way to light up countertops and work surfaces. They’re also great for general ambient lighting in larger rooms.

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The first thing you need to do is figure out the layout of your downlights. Decide which lights will illuminate the whole space and which lights will be used as a light source for tasks.

How many downlights do you need per room?

As a general rule, the amount of downlights The number of downlights required for a space can be estimated with some simple calculations. Generally, one downlight is needed for every 1.5 to 2 square metres of ceiling area. With respect to downlight spacing for general lighting, place them about two feet away from the walls and about half your ceiling height apart from each other. Next, add task lighting anywhere in the room where it’s required. Consider where the shadows may fall in the room, using higher wattage bulbs for tall ceilings.

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The colour temperature you select will depend on your preference for the look and feel of your space. You might choose a 6000K cool blue for a sun-flooded space or a 4000K cool white light, frequently used in home offices. Alternatively, you may select a 3000K warm white to make a space appear warmer and cosier, often considered the best downlights for living rooms. There’s no right or wrong choice when it comes to choosing colour temperature as the overall feel is a personal preference so be sure to pick the ones that look and feel right for you.

A bulb on a hanging pendant with no lampshade has a beam angle of 360 degrees. The recessed nature of downlights means most only have a beam angle of around 45 degrees. If you want to get a bit more light output from your downlights you’ll be able to find some with a slightly wider beam angle of around 60 degrees. There are also downlights with narrow 25 degree beams which are perfect for spotlighting onto a kitchen bench, creating a more concentrated beam of light.

There are a few things you should watch out for before choosing downlights. Firstly, people sometimes rely on them too heavily, especially when lighting large open-plan spaces. In this type of room, you need ambient, task and accent lighting. Downlighting is suited to the first two of these but needs to be applied in different ways, with different-sized fittings. People also attempt to solve lighting problems by filling the ceiling with downlights or increasing the wattage. When done in excess, it can make a space feel overblown with light and stark. You’re much better off using downlights in appropriate spaces while keeping the wattage low, and layering your light with other lighting fixtures in the space. Dimmers are also an excellent option for downlights, giving you the flexibility to change the levels of brightness throughout the day.

Not all downlights are created equal and when it comes to safety, one needs to take the utmost care. The best LED downlights are Insulation Contact (IC) and Insulation Contact - Fire Resistant (IC-F) rated which means they are suitable to come into close contact with ceiling insulation. Older versions required significant gaps with some not even allowed to come into contact with insulation at all. This is because the heat from halogen and incandescent light fittings is such that it poses significant fire risks. Big holes that need to be cut into ceiling insulation make the insulation itself inefficient as warm air and moisture from the room below are drawn up into the ceiling cavity. Fortunately, new technology in IC and IC-F fittings means the heat output of downlights is reduced dramatically and the light cans can either be in contact with insulation or require only a small gap. Just be aware, IC-F downlights are not necessarily fire-rated, so check with the manufacturer first if you need fire-rated lights.

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Dimmers were initially introduced to reduce the power usage of incandescent bulbs, but with the advent of LED technology, that is no longer a primary reason for installing them. Now they have both stylistic and aesthetic functions with the ability to reduce the intensity of light in a room, allowing homeowners to easily control the mood of their space. Dimmers are available in analogue and digital options, but they need to be paired with dimmable bulbs. There are dimmable versions available for most types of LED downlights. Non-dimmable bulbs can still be used in dimmable light fittings, but they will only turn on when 100% voltage is applied.

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As you can see, there are a number of important things to consider before installing downlights but some great benefits to be had when executed well. Downlights are highly functional lights that look great and can really lift a room so be sure to do your preparation to get the best results.

This article was updated on 5th December 2024

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