照明是每单位区域表面上的总发光通量。它以Lux（LX）为单位。
1 cd/m² = 1 br
1 br = 1 cd/m²
例子:
将15 每平方米烛台转换为亮度：
15 cd/m² = 15 br
| 每平方米烛台 | 亮度 |
|---|---|
| 0.01 cd/m² | 0.01 br |
| 0.1 cd/m² | 0.1 br |
| 1 cd/m² | 1 br |
| 2 cd/m² | 2 br |
| 3 cd/m² | 3 br |
| 5 cd/m² | 5 br |
| 10 cd/m² | 10 br |
| 20 cd/m² | 20 br |
| 30 cd/m² | 30 br |
| 40 cd/m² | 40 br |
| 50 cd/m² | 50 br |
| 60 cd/m² | 60 br |
| 70 cd/m² | 70 br |
| 80 cd/m² | 80 br |
| 90 cd/m² | 90 br |
| 100 cd/m² | 100 br |
| 250 cd/m² | 250 br |
| 500 cd/m² | 500 br |
| 750 cd/m² | 750 br |
| 1000 cd/m² | 1,000 br |
| 10000 cd/m² | 10,000 br |
| 100000 cd/m² | 100,000 br |
规则