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 = 929.023 fc
1 fc = 0.001 lm/cm²
例子:
将15 每平方厘米的管腔转换为footcandle：
15 lm/cm² = 13,935.34 fc
| 每平方厘米的管腔 | footcandle |
|---|---|
| 0.01 lm/cm² | 9.29 fc |
| 0.1 lm/cm² | 92.902 fc |
| 1 lm/cm² | 929.023 fc |
| 2 lm/cm² | 1,858.045 fc |
| 3 lm/cm² | 2,787.068 fc |
| 5 lm/cm² | 4,645.113 fc |
| 10 lm/cm² | 9,290.227 fc |
| 20 lm/cm² | 18,580.453 fc |
| 30 lm/cm² | 27,870.68 fc |
| 40 lm/cm² | 37,160.907 fc |
| 50 lm/cm² | 46,451.133 fc |
| 60 lm/cm² | 55,741.36 fc |
| 70 lm/cm² | 65,031.587 fc |
| 80 lm/cm² | 74,321.813 fc |
| 90 lm/cm² | 83,612.04 fc |
| 100 lm/cm² | 92,902.267 fc |
| 250 lm/cm² | 232,255.667 fc |
| 500 lm/cm² | 464,511.334 fc |
| 750 lm/cm² | 696,767.001 fc |
| 1000 lm/cm² | 929,022.668 fc |
| 10000 lm/cm² | 9,290,226.682 fc |
| 100000 lm/cm² | 92,902,266.815 fc |
规则