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The Difference Between Warm White and Cool White

The difference between cool white and warm white is what's called the 'colour temperature'. This is a starts at a more yellow colour, through to a pure white and then into a more blue tinged white. 

The colour differences are measured in Kelvins (K). We have written a guide, below, to help you navigate through the choices available. We have also created a chart, below, with a colour summary, that you should be able to use for comparisons.  

We have also created an LED colours infographic explaining the spectrum in more detail.

If you are looking for LED bulbs and lamps we have a great selection available to buy now.  

 Difference Cool White Warm White

The three main colours

The three main categories of white that are typically used, especially in the home, are warm white, cool white and daylight. 

Warm White 

The most popular for most scenarios, warm white is the closest to the incandescent light bulb (your old traditional light bulb). It tends to be used in the lounge, dining room, living room and bedrooms. It offers a softer light that is suitable for most home situations. 

Cool White

Cool white is most popular in the kitchen and bathroom, where task lighting is important. Task lighting is a light who's primary role is to offer clear light, rather than for decorative purposes. Spotlights or under cabinet lights in a kitchen are classic examples of spotlights, although a bright light for sewing in your living room or a spotlight in your reading corner would also be good examples. For this type of light cool white is by far the most popular choice.

Don't forget to consider the area you are in within, and the style that would suit the area. Some people will opt for a warmer white than cool white in their kitchen, especially if they have a more traditional kitchen, like a shaker style kitchen. 


Daylight is a much bluer light. It offers the harshest light, and as a result is often not used in a home setting, although it can offer great light in somewhere like a garage, where the brighter the better. It's also a firm favourite in Christmas lights, where the blue gives off that crisp frosty feel to your festive scene.  

More About LED

Due to legislation and also a progress in technology LED lights are largely taking over from traditional incandescent light bulbs and halogen lamps now. They offer as bright, if not brighter, light than was possible with old technology and at a fraction of the price to run. 

They also have a much longer lifespan than old light bulb. In terms of halogen lamps, LED are a much more robust technology, so they are far less likely to fail, particularly when you experience electrical surges. 

There are a couple of exceptions to the halogen replacements, normally where technology is not currently offering a viable alternative, such as with linear halogen lamps, but we do expect technology to catch up, by which time we would expect LED to completely take over. 

If you do have any more questions, please don't hesitate to contact our customer service team on 029 2000 2524.

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