What is Color Temperature? What is Kelvin? Is Color Temperature the Same as Brightness?

Color Temperature Explained

Color temperature, measured in Kelvin (K), refers to the perceived color of a light source. Generally:

• Higher Kelvin values produce a whiter or bluish light.
• Lower Kelvin values produce a warmer or yellowish light.

Key Points to Remember

1. Kelvin Measures Color Temperature, Not Brightness

While higher Kelvin values may appear brighter to the human eye, they do not necessarily indicate that the light source emits more energy.

2. Blue Light Perception

Our eyes perceive blue light as brighter than warmer tones due to its high energy and shorter wavelength. This makes blue light appear more intense even at the same energy level as warmer light.

3. Daylight Associations

Daylight typically falls within the high Kelvin range of 5,000–6,500 K. This is why we associate higher Kelvin values with feelings of alertness and brightness.

How to Choose the Right Color Temperature?

When selecting a color temperature for your space, consider these factors:

1. Intended Use

• For relaxation and entertainment spaces, opt for warmer white light (2700K–3000K) to create a cozy atmosphere.

• For workspaces or environments requiring focus, such as offices or hospitals, cooler white light (3500K–4000K) can enhance concentration and productivity.

2. Surrounding Colors

• Choose a color temperature that complements your interior design.
• For instance, a 4000K light can make surrounding colors appear cooler and more vibrant, while 2700K lighting will soften warm tones.

3. Time of Day

• Warm lighting (2700K–3000K) creates a welcoming and relaxing ambiance in the evening.

• Cool white light (4000K and above) is better suited for daytime activities, as it promotes alertness.

By understanding the basics of color temperature and considering the specific needs of your space, you can create an environment that is both functional and visually appealing.