Spacing for minimum footcandle (fc) illumination on level ground:
Note: 1fc for commercial projects / .3fc for residential projects
| Footcandles: | ||
|---|---|---|
| Distance | AL-12 | AL-18 |
| 4' | 1.1 | 1.4 |
| 8' | .23 | .27 |
| 12' | .07 | .11 |
| 16' | .01 | .03 |
| 18' | .01 | |
| For conversion to lumens, multiply footcandles x 10. | ||
