Grade

Function

Illuminance（lx）

Illumination uniformity

Light source

Glare index GR

Eh

Evmai

Uh

Uvmin

Uvaux

Ra

Tcp(K)

U1

U2

U1

U2

U1

U2

Ⅰ

Training and recreational activities

300

—

—

0.3

—

—

—

—

≥65

≤35

Ⅱ

Amateur com petition, professional training

500

—

0.4

0.6

—

—

—

—

≥65

≥4000

≤30

Ⅲ

Professional competition

750

—

0.5

0.7

—

—

—

—

≥65

≥4000

≤30

Ⅳ

TV Broadcast national and international competitions

—

1000

0.5

0.7

0.4

0.6

0.3

0.5

≥80

≥4000

≤30

Ⅴ

TV Broadcast major and international competitions

—

1400

0.6

0.8

0.5

0.7

0.3

0.5

≥80

≥4000

≤30

Ⅵ

HDTV Broadcast major and international competitions

—

2000

0.7

0.8

0.6

0.7

0.4

0.6

≥90

≥5500

≤30

—

TV Emergency

—

750

0.5

0.7

0.3

0.5

—

—

≥80

≥4000

≤30

Note: It is necessary to avoid direct glare to the players, especially to the goalkeeper during a "corner kick"