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What you need to know about UGR Diffuser?

Nov. 27, 2019

The Diffuser Sheet for UGR <19 Solution is mainly used for diffusers on some lamps. The human eye's perception of light is a reference value, so the UGR of the light diffuser used by the lamp has a reference value. For comfort, UGR is required to be less than 19.

Diffuser Sheet for UGR <19 Solution

Diffuser Sheet for UGR <19 Solution

First explain what UGR means. UGR is a psychological parameter used to measure the subjective response of the human eye to the discomfort caused by the light emitted by the lighting device in the indoor visual environment. UGR19 is the psychological output of the subjective response caused by the light emitted by the lighting device in the indoor visual environment to the human eye. This is a standard based on certain summary equipment. The UGR19 light diffusion plate requires the UGR of the light diffusion plate to be less than 19 .

The UGR in the diffuser sheet for URG <19 is a uniform glare value. It is used to judge the human eye's perception of light and comfort, that is, to measure the light emitted by the lighting device in the indoor visual environment. The subjective response's psychological parameters can be calculated using the CIE unified glare value formula in accordance with prescribed calculation conditions.

For UGR in the appropriate comfort range, generally less than 19.

The original industrial and civil lighting design standards stipulated that the direct glare of general indoor lighting is limited according to the brightness limit curve. This limitation method is only for the glare of a single luminaire, and cannot characterize the total glare effect produced by all luminaires in the room. Therefore, CIE proposed the UGR calculation formula based on the calculation formulas of glare in various countries. It is suitable for the general lighting design of simple cube-shaped rooms. The lamps are evenly spaced. The lamps are double symmetrical light distribution. The observation position is generally at the midpoint of the vertical and horizontal walls.

The following methods can be used to prevent or reduce light curtain reflections and reflection glare:

1 Avoid installing lamps in interference areas;

2 Use low gloss surface decoration materials;

3 Limit the brightness of the lamps;

Now whether in industrial or civil lighting, there are certain requirements for the glare value of indoor lighting fixtures, because it has a great impact on the comfort of the human eye, so this is why the light diffusion plate UGR is less than 19.

Currently, it is recommended to use UGR19 light diffusion plate to use the light diffusion plate, so that it is more comfortable for human eyes, and the light produced by the manufactured lamps is more comfortable.

You will also notice that the lower the reflectivity of the room, the higher the UGR value. It is also well understood that the lower the reflectivity of the room, the greater the contrast between the light of the luminaire and the background light of the room, the greater the discomfort caused by the glare. However, these low reflectivity room environments are not suitable for installing panel lights. For example, the reflectivity of roofs and walls is only 30%. Generally, it is a bar or entertainment place. Spotlights or downlights are usually used. Our company is UGR <19 Supplier, welcome to consult.


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