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 pm = 1 br
1 br = 1 pm
例子:
将15 光度测量转换为亮度：
15 pm = 15 br
| 光度测量 | 亮度 |
|---|---|
| 0.01 pm | 0.01 br |
| 0.1 pm | 0.1 br |
| 1 pm | 1 br |
| 2 pm | 2 br |
| 3 pm | 3 br |
| 5 pm | 5 br |
| 10 pm | 10 br |
| 20 pm | 20 br |
| 30 pm | 30 br |
| 40 pm | 40 br |
| 50 pm | 50 br |
| 60 pm | 60 br |
| 70 pm | 70 br |
| 80 pm | 80 br |
| 90 pm | 90 br |
| 100 pm | 100 br |
| 250 pm | 250 br |
| 500 pm | 500 br |
| 750 pm | 750 br |
| 1000 pm | 1,000 br |
| 10000 pm | 10,000 br |
| 100000 pm | 100,000 br |
规则