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CCT, or Correlated Color Temperature, is a measure of the colour temperature of a light source, specifically referring to white light. It is expressed in Kelvin (K) and measured on a scale of 1,000 to 10,000 K. CCT allows users to select the colour temperature of the light, from warm (2700K) to cool (5000K+), creating different atmospheres and evoking different moods.
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What You'll Learn
CCT stands for Correlated Colour Temperature
CCT is an acronym with several meanings, one of which pertains to electrical engineering and is defined as "Circuit". In the context of electrical engineering, a circuit is an electrical arrangement that requires specific components: a source of voltage, a closed loop of wiring, an electric load, and a means to open and close the circuit.
However, CCT can also stand for "Correlated Colour Temperature", a term that defines the colour appearance of a white LED. This definition of CCT is measured in degrees Kelvin, with a warm light typically around 2700K, neutral white at approximately 4000K, and cool white at 5000K or higher.
The use of the acronym CCT in electrical engineering is context-dependent and can refer to either "Circuit" or "Correlated Colour Temperature". When referring to circuits, CCT represents the path of electrical flow, encompassing the power source, outlet, and return to the ground. On the other hand, CCT as "Correlated Colour Temperature" is specifically relevant to the colour characteristics of white LEDs.
In summary, while CCT primarily represents "Circuit" in electrical engineering, it also has a meaningful application as an abbreviation for "Correlated Colour Temperature", particularly in the realm of LED lighting, where it helps define the colour appearance of white LEDs.
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CCT is measured in Kelvin (K)
CCT, or Correlated Colour Temperature, is a measure of the colour temperature of a light source, expressed in Kelvin (K). It is a gauge of how yellow or blue the colour of light emitted from a light bulb appears. CCT is not a measure of brightness but rather a measure of the colour of the light itself.
CCT is measured in Kelvin, with lower Kelvins appearing as a warm light, similar to candlelight or incandescent lamps. These lights have a higher proportion of red, orange and yellow wavelengths. A warm light typically falls between 2200 and 3000 Kelvin degrees, with 2700K being a common CCT value for a warm white light.
At the higher end of the Kelvin scale, lights are cooler in tone, with more blue wavelengths. These lights are described as cool or cold and are often used to promote alertness and calm. A cool light typically starts at around 5000 Kelvin degrees.
Between these two extremes, at around 4000 Kelvin degrees, is a neutral white light. This is the most common LED light option as it is the most similar to daylight.
The CCT of a light can be selected to suit the purpose of the space it will be used in. For example, a warm light is often used in residential settings to create a cosy and inviting atmosphere, whereas a cool light may be used in an office to promote alertness.
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CCT applies only to white light
CCT, or Correlated Colour Temperature, is a measure of the colour of light emitted from a light bulb. It is a gauge of how yellow or blue the light appears and is measured in Kelvin (K). CCT applies only to white light.
The CCT of a light bulb can be selected from a small number of fixed options, usually two or three. These include warm-white (3000K), neutral white (4000K), and cool white (5000K). A lower CCT value, such as 2700K, indicates that the light contains a substantial proportion of red, orange, and yellow wavelengths, giving it a "warm" appearance. A higher CCT value, such as 5000K, would have less red and orange but more blue wavelengths, resulting in a "cool" white light.
The choice between a warm or cool CCT depends on the atmosphere and colours of the space it will illuminate. In a relaxed environment, such as a living room or nursery, a low, warm CCT is common. A warm white light source will highlight other warm colours in a room, appear less bright, and is least likely to show imperfections. On the other hand, in an office or warehouse where visibility is crucial, a higher CCT (natural or cool white) is preferred as it appears brighter and more crisp. Cooler colour temperatures can also promote alertness and calm.
It is important to note that CCT is not an indicator of the quality of white light. Instead, the Colour Rendering Index (CRI) is used to determine how well a particular white light enables us to perceive the colours of illuminated objects. A high CRI, above 90, indicates a good quality artificial white light.
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CCT values range from 2200K to 6500K
CCT, or Colour Temperature, is a technical term used to indicate the colour components of a light. It is a measure of whether the light emitted by a lamp is yellow or blue. CCT is expressed in Kelvin (K) and measured on a scale of 1,000 to 10,000 K. The most common CCT values range from 2200K to 6500K.
A lower Kelvin value indicates a warmer light, while a higher Kelvin value indicates cooler, bluer light. A warm light source, such as an incandescent bulb, has a low colour temperature (2200-3000K) and features more light in the red, orange and yellow range. This creates a comfortable atmosphere in living spaces, bedrooms, and dining areas.
A neutral white light commonly has a temperature of 4000K. This provides a well-balanced and adaptable lighting solution, making it suitable for general lighting purposes in offices, kitchens, and retail environments.
A cool white light has a higher colour temperature (5000K and above), which is expressed as more light in the blue range. This promotes focus and concentration, making it suitable for task-oriented areas such as workstations, garages, and workshops, as well as outdoor lighting.
The CCT value of a light fitting can be selected from a small number of fixed options. For example, a colour selectable light fitting may offer a choice of two CCT values, such as 3000K and 4000K, or three values, such as 3000K, 4000K, and 5000K. This allows the user to change the colour temperature after installation without replacing the entire fitting.
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CCT impacts the mood and behaviour of people
CCT, or Correlated Colour Temperature, is a measure of the colour of light emitted from a light bulb, specifically how yellow or blue it appears. It is measured in Kelvin (K) and is usually between 2200 and 6500 Kelvin degrees.
The choice between warm and cool light can have a significant influence on the mood and atmosphere of a space. For example, warm CCT lighting is often used in bedrooms or living rooms to create a cosy and inviting ambiance conducive to relaxation. Cooler CCTs are used in offices to promote alertness and calm.
Lighting design professionals consider CCT when creating lighting schemes for various settings, such as homes, offices, and healthcare facilities. By strategically choosing warm or cool light sources, they can regulate occupants' moods and enhance their overall well-being.
The integration of CCT control in smart lighting systems has further increased the demand for customisable CCT settings. Users can now tailor their lighting experiences to suit their preferences, enhancing the overall ambiance and mood in various settings.
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Frequently asked questions
CCT stands for Correlated Color Temperature.
CCT is measured in Kelvin (K) and describes if a white light is warm (2700K-3000K), neutral (4000K) or cool (5000K and above).
CCT is a gauge of how yellow or blue the colour of light emitted from a light bulb appears. Lower Kelvin values indicate a warmer light, while higher Kelvin values indicate cooler, bluer light.
CCT is important because it helps create the perfect ambiance for your application and enhances your overall lighting experience. Different colours of light can impact mood and behaviour.
