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First, what the definition of Glare is.
Refers to a visual condition in which visual discomfort and reduced visibility of objects result from inappropriate brightness distribution in the field of view or extreme brightness contrast in space or time.
Second, what the cause of glare is.
1. Abuse of spotlights
Unreasonable light layout leads to direct viewing of strong light in the active area, leading to glare. In particular, the use of track lights in large areas in home decoration can easily lead to serious glare.
2. The embedded spot lamp position is unreasonable
Especially in the area with frequent activities, please follow the figure below when designing the lamp hole position.
Tips: Glare refers to the dazzling light in the range from 30 ° above to 60 ° below when the human eye looks at the head up.
3. If the light source is exposed, the abuse of bulbs, light strips and line lamps will also cause glare.
Transparent LED bulbs like the one shown in the figure below will also cause serious glare if there is no reflection and diffusion of the lampshade. Especially in the luxury crystal lamps, in order to make the crystal effect more bright, many people will use similar light sources.
Third, What is glare index?
Glare has an important impact on the health of light environment. Therefore, there is an industry standard for judging the comfort of light environment, one of which is glare index. The glare index (UGR) is a psychological parameter that measures the subjective reaction of discomfort to human eyes caused by the light emitted by lighting devices in the indoor visual environment. If the UGR is greater than 19, glare will easily attract attention and cause irritation to human eyes; If the UGR is less than 19, the glare is acceptable to the human eye.
Above all, the solutions for glare.
1.Shading angle
Definition: also known as glare protection angle, it refers to the included angle between the connecting line between the outermost point of the light source luminous body and the edge of the light outlet of the lamp and the horizontal line passing through the light center of the light source.
The light shielding angle of lamps in normal use shall be at least 10 ° - 15 °. In the environment with high lighting quality requirements, the lamp shall have a light shielding angle of 30 ° - 45 °. Increasing the shading angle will reduce the efficiency of the lamp, and these two aspects should be considered.
Excessive shading angle can effectively alleviate glare, but it also reduces the effective use rate of light. In order to improve the use rate of light and make the light look brighter, many manufacturers will use reflective paper. Improper use of reflective paper will also cause secondary glare.
2. Anti-glare aperture is used to reduce glare
Showed like LEDvance product.
Summary:
Glare is caused by the lamp itself, to a greater extent, the rational use of the lamp. The glare index CGI, shading angle and light utilization ratio shall be comprehensively referred to when purchasing lamps, and the embedded lamps shall be as accurate as possible in the opening position. We should not only reduce glare in product selection, but also pay attention to rational use.
The above content is provided by WOSEN. WOSEN is a professional manufacturer and supplier of Led Flood Light, Led Street Light, Led Solar Light, etc. For more information, please visit https://www.wosenled.com/ or contact admin@wosenled.com or WhatsApp +86-13425434349
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