Complete Guide for Correlated Color Temperature

Complete Guide for Correlated Color Temperature

Part 1. CCT Meaning
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Correlated color temperature (CCT) is a measure of the "color" of a light source, expressed in Kelvin (K). It corresponds to the temperature of an ideal black body that would emit light of a similar "color." CCT is measured on a scale from 1,000 to 10,000 K. Different colors of light can impact our mood and behavior.

Part 2. Color Temperature Scale

The Color Temperature Scale is a way of measuring the color of light. It is measured in Kelvins (K), and it is a scale from red to blue. The lower the Kelvin value, the more red the light is. The higher the Kelvin value, the more blue the light is.
 

Part 3. How is Kelvin Measured?

Kelvin is a scale used to measure color temperature, typically ranging from 1,000 to 10,000. Lower Kelvin values indicate warmer light, while higher Kelvin values indicate cooler and bluish light.
Color temperatures can be determined using a colorimeter, which analyzes white light and separates it into constituent colors. Each of these colors is then assigned a corresponding value on the Kelvin scale.

Part 4. Color Temperature of Light Bulb

n addition to considering the type of light bulb, utilizing Kelvin temperature can assist in selecting the appropriate fixture for different settings. Whether you require a light bulb for ambient lighting or focused tasks, the following Kelvin ranges can serve as a helpful guide:​

Warm and Cozy Ambiance: (2200K-2700K): These Kelvin ranges can create a comfortable atmosphere in living spaces, bedrooms, and dining areas.

Neutral White (3000K-3500K): Falling within this range, this Kelvin temperature provides a well-balanced and adaptable lighting solution which is preferred for general lighting purposes in offices, kitchens, and retail environments.

Cool White (4000K-4500K): With a higher Kelvin range, this lighting temperature promotes focus and concentration making it suitable for task-oriented areas such as workstations, garages, and workshops.

Daylight and Outdoor Lighting(5000K-6500K): This Kelvin range effectively emulates daylight and is widely employed for outdoor lighting or areas demanding maximum brightness and clarity. It is especially suitable for illuminating stadiums, parking lots, and outdoor recreational spaces.​

By considering the Kelvin temperature, you can ensure that the light fixture complements the intended purpose and ambiance of the space.

Part 5. Color Temperature Application

Find more details for the color temperature application in the chart below:
Setting/Application Correlated Color Temperature
Household Applications
Living Room
A warm white light 2200K-3000K is best for the living room since it creates a cozy, inviting atmosphere that helps you relax and unwind.
Bedroom Warm white light with a color temperature between 2200K-3000K is ideal since a relaxing and comfortable environment is needed for a bedroom.
Kitchen
The kitchen is where people want to feel energized and inspired because they spend time with friends and family. A color temperature of 3000K-5000K will help achieve this goal.
Bathroom
A color temperature of 3000K-5000K will help create an atmosphere that makes us feel relaxed and rejuvenated.
Commercial Applications
Office
An office is a place where people need concentration and focus. In this environment, a color temperature that is not too stimulating is quite important, as this can lead to distraction and decreased productivity. A cool white or daylight color temperature (3000K-5500K) is typically best for an office setting.
Restaurant
If the restaurant creates a cozy, romantic atmosphere, try using bulbs with a lower color temperature around 2700K. This will also be a good choice if the restaurant has dark wood floors and furniture, as the warm light will help to create a cohesive look.
For a brighter, more energetic space, go for a higher color temperature, around 3500K-4100K. This will make the restaurant feel clean and modern and is a good choice if you have white walls and lots of natural light.
Shop A cool white light (around 6000K) is best for a shop because it can make the space seem bright and clean. But note that you can also choose a warmer CTT(2700-4000k), all up to your shop design.
Hotels
Lobby
Warm color temperature (2700K – 3000K): The light is close to the natural light at dusk. It creates a warm and inviting atmosphere.
Guest Rooms
Color temperatures of around 2200K-2700K are often used in guest rooms, as they provide a warm and inviting feeling.
Common areas
Neutral white (3500K – 4500K): The light in the middle of the day. It is bright and energetic without being harsh.
Educational Establishments
Classrooms The color temperature of light in a classroom should be between 3500-4000K to help students stay awake and alert.
Dining areas Dining rooms at schools are often lit by neutral white (2700-3500K)​​