Betopper LC002-H 200W COB LED PAR Bühne

LED Source

Voltage

Rated Power

Steuerungsmodus

DMX Channel Modes

Color temperature

The **Color Rendering Index (CRI)** is a quantitative measure used to evaluate how accurately a light source renders the colors of objects compared to a natural or ideal light source, typically daylight or incandescent light. It is an important metric in lighting design, especially for applications where color accuracy is critical, such as photography, art galleries, retail environments, and medical facilities. ### Key Points about CRI: 1. **Scale**: - The CRI scale ranges from 0 to 100. - A CRI of 100 indicates that the light source perfectly renders colors, similar to natural light. - Lower CRI values mean the light distorts colors, making objects appear less vibrant or true to their actual color. 2. **Testing Method**: - CRI is determined by comparing how a light source renders a set of standardized color samples (called test color samples or TCS) against a reference light source. - For daylight or incandescent light, the reference is a blackbody radiator with the same color temperature as the tested light source. - The differences in color rendering are quantified, and the average score across multiple color samples determines the CRI value. 3. **Ra Value**: - The most commonly used CRI metric is called **Ra**, which represents the average color rendering index across eight pastel and medium-saturated color samples (R1 to R8). - Some lighting professionals also consider extended indices like R9 (saturated red) for more specialized applications. 4. **High vs. Low CRI**: - **High CRI (80–100)**: Ideal for applications requiring accurate color perception, such as art studios, retail displays, and surgical lighting. - **Low CRI (<70)**: Suitable for general-purpose lighting where color accuracy is not critical, such as industrial warehouses or outdoor lighting. 5. **Limitations of CRI**: - CRI only evaluates a limited set of colors (R1–R8), which may not fully represent all real-world scenarios. - It does not account for saturated colors, which can lead to misleading results in some cases. - Newer metrics, like the **TM-30-20** method developed by the Illuminating Engineering Society (IES), provide a more comprehensive evaluation of color rendering. 6. **Common CRI Values**: - Incandescent bulbs: ~100 CRI - Halogen bulbs: ~100 CRI - Fluorescent lights: ~60–90 CRI (depending on quality) - LED lights: ~70–98 CRI (high-quality LEDs can achieve very high CRI) ### Practical Applications: - **Retail**: High-CRI lighting ensures products look appealing and true to their actual colors. - **Art Galleries and Museums**: Accurate color rendering enhances the viewer's experience. - **Healthcare**: Proper lighting helps doctors identify skin tones and diagnose conditions accurately. - **Photography and Videography**: High CRI lighting avoids color distortion in images and videos. If you're selecting lighting equipment, always check the CRI value to ensure it meets the requirements of your specific application. For critical tasks, aim for a CRI of at least **90** or higher.