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LED colour temperature

Published on : 2018 - 09 - 19

Multi  Luminaire

Multi Luminaire

Multi Luminaire
LED colour temperature

LED colour temperature

Warm, neutral or cold?

The colour temperature of a lightbulb or fixture is one of the key criteria for making a smart lighting choice for every room in your home. Light colour temperature can have a drastic effect on people. Indeed, it has an impact on the comfort and atmosphere of each room, with positive or negative effects on the concentration and feelings of people living there.


What is colour temperature?

A lightbulb’s colour temperature is the colour of a perceived light source, which in turn determines the colour the light will diffuse. In the lighting business, we refer to warm, neutral or blue hues. Colour temperature is calculated in Kelvins (K). The lower the Kelvin rating, the more the diffused light will be hot (yellow). The higher it is, the colder the light (blue). Here's how to distinguish between these three different hues.


Warm white

Warm white falls between 2,500 K and 3,000 K. We suggest using this shade for rooms where you want to create a cozy, relaxing and comfortable atmosphere. Warm white is the ideal lighting for bedrooms, living rooms, entrances and dining rooms. The lower the Kelvin rating, the more its brightness will have a relaxing effect. Keep in mind, though, that warm white can affect the colour of your room’s décor. Since its reddish hue adds warmth, it can make white walls look slightly cream.


Neutral white

Neutral white falls between 4000 K and 4500 K and between warm white and cold white. Since its light is neither too white nor too yellow, it suits a greater number of people. This type of white is ideal for rooms that need bright and powerful functional lighting. We recommend it for the bathroom, kitchen, office, staircases and corridors as it provides optimal light and renders colours well. It’s also useful for outdoor spaces. Neutral white is easy on the eyes and energizing. With this type of white, your white walls will look brighter and more sparkling.


Cold white

Also called blue white, cold white falls between 4,600 K and 6,500 K. Bright lighting influences not only your sense of well-being but also your level of concentration and motivation. That's why cold white is perfect for rooms and spaces that require powerful, dynamic lighting, such as garages, basements, work areas and outdoors. Cold white shows bodies and objects in their true aspect. Images appear more accurate and precise under this type of lighting. Due to the cold ambience it generates, cold white isn’t very soothing. Therefore, we don’t recommend using it in living rooms and bedrooms.


Here’s a handy reference:

Candle: very warm light between 1,500°K and 2,000°K
Incandescent lightbulb: about 2,700°K
Halogen lightbulb: 2,800°K
Light before dusk: 4,000°K
Camera flash: 7,000°K
Overcast sky: about 7,500°K


Since each person may perceive colour temperature differently, don’t hesitate to perform your own tests with a lightbulb in each shade of white. Then, you can choose the colour temperature that best suits your preference and perception. 


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