Quality characteristics lighting
A
a
hs
8
6
4
3
2
1
8 10
3
10
4
2 4
5 3
Luminance cd/m2
Quality class
A
1
2
3
1000
2000
750
1500
500
1000 750
<300
500 <300
2000 1000 500 <300
2000 1000 500 <300
for nominal illuminance (lx)
UGRL
13 28
= 45°
= 85°
85°
75°
65°
55°
45°
.
The new European standard sets UGR 19
as the maximum permissible value for
offices, which equivalent the luminance
limiting curve for 500 Quality class 1.
The limit value method was used the
former standard DIN 5035 assess the glare.16
The Lighting Handbook
The luminance limit curve method assesses
the mean luminance luminaire from a
viewing angle 45° 85°
