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 lm/cm² = 1.0570e-12 ly
1 ly = 946,100,000,000 lm/cm²
例子:
将15 每平方厘米的管腔转换为光明年：
15 lm/cm² = 1.5855e-11 ly
| 每平方厘米的管腔 | 光明年 |
|---|---|
| 0.01 lm/cm² | 1.0570e-14 ly |
| 0.1 lm/cm² | 1.0570e-13 ly |
| 1 lm/cm² | 1.0570e-12 ly |
| 2 lm/cm² | 2.1139e-12 ly |
| 3 lm/cm² | 3.1709e-12 ly |
| 5 lm/cm² | 5.2849e-12 ly |
| 10 lm/cm² | 1.0570e-11 ly |
| 20 lm/cm² | 2.1139e-11 ly |
| 30 lm/cm² | 3.1709e-11 ly |
| 40 lm/cm² | 4.2279e-11 ly |
| 50 lm/cm² | 5.2849e-11 ly |
| 60 lm/cm² | 6.3418e-11 ly |
| 70 lm/cm² | 7.3988e-11 ly |
| 80 lm/cm² | 8.4558e-11 ly |
| 90 lm/cm² | 9.5127e-11 ly |
| 100 lm/cm² | 1.0570e-10 ly |
| 250 lm/cm² | 2.6424e-10 ly |
| 500 lm/cm² | 5.2849e-10 ly |
| 750 lm/cm² | 7.9273e-10 ly |
| 1000 lm/cm² | 1.0570e-9 ly |
| 10000 lm/cm² | 1.0570e-8 ly |
| 100000 lm/cm² | 1.0570e-7 ly |
规则