The UGR method is used to calculate the degree of discomfortable glare in a symmetric indoor facility. Calculating according to the equation below,
a Unified Glare Rating (UGR) can be arrived at.
But don’t worry about this equation.
We calculate it for you.
Figure 1 Example of differences in contrast between dark and light backgrounds.
|Ref. no.||UGRL||Examples of area, task or activity|
|5.26.3||UGR16||Office: Technical drawing work|
Office: Writing, typing, reading, data processing
|5.2.1 5.27.1||UGR22||Common spaces in buildings: Cafeterias, serving rooms
Retail trade: Sales area
|5.2.4||UGR25||Common spaces in buildings: Cloakrooms, washrooms, bathrooms, toilets|
|5.1.1||UGR28||Communication areas: Communication areas and corridors|
A room has certain conditions that can’t always be influenced but nonetheless have an effect on UGR value.
(See the standard values for reflectances on ceiling/wall/floor in the Light Template Indoors p. 8)
You can affect the UGR value with the choice of luminaire and lighting.