Spacing for minimum footcandle (fc) illumination on level ground:
Note: 1fc for commercial projects / .3fc for residential projects
| Footcandles: | ||
|---|---|---|
| Distance | DS-10 | DS-20 |
| 2' | 1.0 | 2.2 |
| 4' | .24 | .58 |
| 6' | .10 | .12 |
| 8' | .03 | .05 |
| 10' | .01 | .03 |
| 12' | .01 | |
| For conversion to lumens, multiply footcandles x 10. | ||
