This technical article, which answers the question "What is glare (cd/m²)?", will also touch upon its importance in the lighting industry. In lighting design, light intensity alone is not the only important factor. Light color, whether it is direct or indirect, its angle, and how the light is perceived are also crucial. This article focuses on how light is perceived. In interior spaces, it is generally measured in luminosity (lux). In exterior spaces, such as tunnel and road lighting, the concept of glare (cd/m²) takes center stage. Glare refers to the level of brightness perceived by the human eye. Ultimately, it is a fundamental determinant of visual comfort.
What is glare (cd/m²) and why is it important in lighting design?
We mentioned that while lux (lx) is used for measurements in indoor spaces, glare (cd/m2) is used for underpasses, tunnels, or roads. Glare refers to the total light intensity per square meter (cd/m2).
Okay. difference between luminous intensity (lux) and luminance What is it?
- E - Luminous Violence - Lux (lx) = lm/m2
- L - Glitter = cd/m2
While the lumen value, light angle and distance from the source are important in luminance, the colour, pollution rate and texture of the surface are also important in luminance. In other words, the difference of luminance is the detail properties of the surface.
In summary, lux is the brightness value, while luminosity is the brightness perceived by the human eye. Two different lighting sources providing the same lux value will produce different luminosities on different walls. This is due to the surface characteristics of the walls. On a darker wall, the perceived brightness value, or luminosity (cd/m2), will be lower.
Glare level is a critical visual parameter, especially for drivers. Sudden light changes at tunnel entrances must be balanced with a low glare level to prevent eye strain and maintain driving comfort. Similarly, in offices, surface glare should be considered to reduce screen reflections.
The aforementioned glare is not merely a technical measurement. As we mentioned at the beginning, it is the clearest indicator of the true brightness perceived by the eye. Considering glare values in lighting design is important because it allows you to achieve energy efficiency and eye comfort. Furthermore, you can achieve ideal glare with the right surface selection and the correct light angle. This also applies to LED luminaires. reflector and diffuser cover It makes its parts important.
