Appendix
Appendix Conversion table (footcandles and lux)
| Footcandles to lux | Lux to footcandles | ||
| 1/2 | 5.4 | 10 000 | 930 |
| 1 | 11 | 5 000 | 465 |
| 2 | 22 | 4 000 | 372 |
| 3 | 32 | 3 000 | 280 |
| 4 | 43 | 2 500 | 232 |
| 5 | 54 | 2 000 | 186 |
| 6 | 65 | 1 000 | 93 |
| 7 | 75 | 500 | 46 |
| 8 | 86 | 250 | 32 |
| 9 | 97 | 200 | 19 |
| 10 | 107 | 100 | 9 |
| 50 | 540 | 50 | 5 |
| 100 | 10 764 | 10 | 1 |
| 1 fc = 10.764 lux | 1 lux = 0.0929 fc | ||
Typical light intensities
| Flood (luxlfc) | Spot (luxlfc) | Measured at distance m (ft) | ||
| Fresnel spotlight | 200 W | 100/10 | 700/65 | 5(16) |
| (tungsten-halogen) | 300 W | 125/12 | 800/75 | 5(16) |
| 1 kW | 1 280/119 | 8 000/743 | 3(10) | |
| 2 kW | 1 900/176 | 11 900/1106 | 5(16) ... |
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