Spacing for minimum footcandle (fc) illumination on level ground:
Note: 1fc for commercial projects / .3fc for residential projects
| Footcandles: | ||
|---|---|---|
| Distance | CB-10 | CB-20 |
| 2' | 1.5 | 3 |
| 4' | .31 | .88 |
| 6' | .14 | .33 |
| 8' | .08 | .14 |
| 10' | .03 | .08 |
| 12' | 0.1 | 0.3 |
| 14' | .01 | |
| For conversion to lumens, multiply footcandles x 10. | ||
