Insights

The Importance of Color Rendering in Retail Lighting

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What is color rendering?

Color rendering refers to a light source’s ability to accurately reproduce colors of objects.

In lighting applications, a light source with good color rendering can accurately replicate the colors of objects, making them look consistent or closer to what is seen under natural light.

Common color rendering evaluation metrics include CRI and TLCI. Good color rendering can enhance people’s perception and recognition of object colors, and is crucial in scenarios where accurate color identification is needed, such as in painting, printing, electronic displays, etc.

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How does color rendering affect retail stores?

Insufficient color rendering can have a negative impact on product quality and customer experience.

Poorly rendered colors can make products appear dull, monotonous, and unattractive, which can hinder customer purchase decisions.

On the other hand, good color rendering can enhance product appearance and create a more positive shopping experience. In addition to affecting the perception of product quality, color rendering also affects the overall ambiance of retail stores.

Poorly rendered colors can make spaces look unappealing and boring, while good color rendering can create a warm and inviting atmosphere.

This is especially important for professional retail stores where products are closely related to their environment.

What are the evaluation criteria for light color rendering?

The evaluation criteria for light color rendering mainly include the following:

1、CRI Index

Color Rendering Index, which is an indicator of a light source’s ability to reproduce colors of objects.

Generally, Ra is used as the index, with a higher value indicating better color rendering ability, with a maximum value of 100.

2、R9 value

A light source’s ability to reproduce red colors. A higher R9 value indicates a better ability to reproduce red colors.

3、TM-30:2018 Index

This is a new light source color rendering evaluation method proposed by the Illuminating Engineering Society (IES) of the United States.

It measures light source color rendering ability through two parameters, Rf and Rg.

4、TLCI Index

Television Lighting Consistency Index, which is a color rendering evaluation index specifically designed for the photography and film production industries.

Its value ranges from 0 to 100, with a higher value indicating better color rendering ability, providing better photography and film production results.

5、GAI value

Gamut Area Index, which is an indicator of light source color saturation. A higher GAI value indicates a better ability to reproduce color saturation of the light source.

These evaluation criteria can help users choose the right light sources for their specific lighting needs to achieve better lighting effects.

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What kind of lighting fixtures have good color rendering for retail stores?

For retail stores, lighting fixtures that can accurately reproduce the colors of products and present natural brightness are considered to have good color rendering.

Generally, lighting fixtures with a CRI (Ra) greater than 80 and a TLCI greater than 90 are considered to have good color rendering.

The color temperature of the lighting fixtures should also be chosen according to the specific store and products in order to present the best visual effects.

Is it necessary to use the TM-30 index for retail store lighting fixtures?

TM-30 is a method for evaluating the color rendering of lighting fixtures, which provides more comprehensive and accurate information on color quality, including color vividness, saturation, color temperature, etc.

It can help to choose lighting fixtures that are more suitable for the specific needs of a store. For stores with high requirements, selecting lighting fixtures using the TM-30 index may be more appropriate.

However, for some general stores, using the traditional CRI index can also meet their lighting needs.

Is the GAI index necessary for retail store lighting fixtures?

The GAI index is an indicator of the effect of lighting fixtures on color vividness and naturalness. If a store needs to accurately present the colors and appearance of its products, the GAI index can be considered to evaluate the performance of lighting fixtures.

However, the GAI index is relatively new and has not yet been widely adopted. The TM-30 index is more commonly used in commercial settings. Therefore, the decision to use the GAI index or not should be based on specific circumstances.

Which index is better, TLCI or CRI?

Both TLCI (Television Lighting Consistency Index) and CRI (Color Rendering Index) are indicators used to measure the color rendering ability of lighting devices, but they have some differences.

CRI is a widely used index that measures the similarity of lighting devices to natural light when reproducing eight basic colors.

The CRI index is usually represented by a number from 0 to 100, with a higher value indicating better color rendering ability. However, CRI only considers the rendering ability of eight basic colors, and has weaker evaluations of the rendering ability of other colors.

TLCI is a measure designed specifically for television and film production. It evaluates the performance of lighting devices when reproducing all colors, using a more detailed testing process.

The TLCI index is also represented by a number from 0 to 100, with a higher value indicating better color rendering ability. Because TLCI considers the rendering ability of more colors, it is a more accurate indicator for fields with higher color requirements such as television and film.

Although TLCI and CRI are both indicators used to measure the color rendering ability of lighting devices, TLCI is more detailed, accurate, and suitable for fields with higher color requirements such as television and film.

What benefits will high TLCI index lighting fixtures bring to retail stores?

A high TLCI rating indicates that the light source has consistent and accurate color rendering, allowing customers to see the true colors of products while also bringing more attractive colors to photos and videos, resulting in a better shopping experience and increased customer satisfaction.

It can help improve the overall ambiance and appearance of the store, making it more appealing to customers. High TLCI light sources can also improve the quality of photos and videos taken inside the store, making it easier to showcase products online or in other marketing materials.

Factors to Consider When Buying Lights for Retail Stores

When purchasing lighting fixtures for retail stores, besides color rendering ability, the following aspects should also be considered:

1、Power

The power of the lighting fixture determines the basic visual effect of the products. It is necessary to choose the appropriate power according to the size of the space and the required illumination, or whether the lighting fixture power matches the designer’s drawings.

2、Color temperature

Different color temperatures will have different effects on the presentation of products. It is necessary to choose the appropriate color temperature according to the store’s style and the nature of the products.

3、Lighting angle

Select the lighting angle according to the desired effect. If you want to highlight the product, choose a lighting fixture with a small angle of 24° or 36°. If it is for basic lighting, choose a lighting fixture with an angle of 60° or more. Different lighting fixtures have different lighting angles, so choose the appropriate lighting angle based on the location of the product display and the features that need to be highlighted.

4、Energy efficiency

Energy-saving and environmental protection are the main trends of modern lighting fixtures. Choosing energy-efficient lighting fixtures can save energy and reduce operating costs.

5、Dimming function

Dimmable lighting fixtures can adjust the brightness according to different needs, which is more flexible and can also save energy.

6、Quality and brand

Choose reliable quality and good after-sales service brands and products to ensure the quality and service life of the lighting fixtures.

7、Lighting control

Lighting control is also important. Choose the appropriate lighting control method according to the needs, such as manual switches, remote controls, smartphone apps, etc.

How to Ensure the Best Color Rendering in Retail Store Lighting?

1、Choose high color rendering lighting fixtures: Select lighting fixtures with high TLCI and CRI values to ensure better color reproduction.

2、Select appropriate color temperature: Different color temperatures of lighting fixtures can affect the color rendering effect. When choosing lighting fixtures, consider the store’s decoration and product characteristics to select an appropriate color temperature.

3、Balance lighting layout: The layout and lighting design of the store should be balanced to ensure proper lighting in every area, reducing color deviation.

4、Maintain cleanliness: Dust and stains can affect the lighting effect and color rendering ability of lighting fixtures, so it is essential to regularly clean and maintain the fixtures.

5、Conduct on-site testing: After selecting and installing the lighting fixtures, it is best to conduct on-site testing to ensure that the color rendering meets the requirements.

In summary, color rendering is an essential aspect of retail store lighting design. Good color rendering can enhance the appearance of products, create a positive shopping experience, and contribute to the overall ambiance of the space. By selecting lighting fixtures with high CRI values, considering their position and intensity, and using supplementary lighting, retail store owners can ensure the best color rendering in their space.

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