If there are extremely bright objects within the field of view, or the brightness contrast is too large, or there is extreme contrast in space and time, it can cause uncomfortable vision, or cause a decrease in visual function, or produce both effects at the same time. This phenomenon is called glare, which is more obvious with flashlight light or construction lighting at a construction site.
Glare is the most important factor affecting lighting quality.
1. Four factors affecting glare
Luminaire brightness;
The length of the room and the height at which the luminaire is installed (i.e. pitch-to-height ratio);
The level of visual adaptation represented by average horizontal illuminance;
Type of lamp, such as whether the side of the lamp emits light, etc.;
2. Common methods of anti-glare
(1) Shading angle>30 degrees
The shading angle of conventional lamps is based on the elevation angle of 30 degrees for normal human vision. Only when the shading angle of the lamp is greater than 30 degrees can the light be prevented from directly entering the human eyes.
Increase the installation height of the light source
Deep illumination lamps increase the installation height of the light source to achieve the purpose of increasing the shading angle while keeping other structures unchanged.
(2) Conventional lamps + cross anti-glare lamps shading angle
The cross anti-glare grille mainly blocks light in both vertical and horizontal directions. Adjust the critical position of glare from the boundary to the center of the lamp, thereby increasing the shading angle to achieve the purpose of anti-glare.
(3) Honeycomb anti-glare
Honeycomb anti-glare grille can block light from all directions. It is the easiest to use among all anti-glare accessories, but it has the largest light loss. If you want the environment to have high illumination, you need to add more lamps.
(4) Shading leaves to prevent glare
The shading leaf can block light from all directions, making it easy to adjust the light. It is the most flexible anti-glare accessory. However, this accessory is relatively large and is generally used with track lights. It is neither beautiful nor convenient.
(5) Deeply concealed to prevent glare
Hiding is to hide the light source deeper, reduce the range of the light source, cover part of the light source, ensure that people cannot directly see the light source within a certain visual range, and reduce direct glare. It is a common anti-glare method on the market, but the lamp body The height is usually higher, making it less suitable for places with limited ceiling height.
(6) Soft glass
Soft glass includes frosted glass, textured glass, textured + frosted glass, etc., which can reduce the brightness of the light source surface to a certain extent and achieve an anti-glare effect to a certain extent.
