Spacing for minimum footcandle (fc) illumination on level ground:
Note: 1fc for commercial projects / .3fc for residential projects
| Footcandles: | ||
|---|---|---|
| Distance | GN-10 | GN-20 |
| 2' | 1.45 | 12.9 |
| 4' | .30 | .86 |
| 6' | .13 | .31 |
| 8' | .09 | .11 |
| 10' | 0.3 | .07 |
| 12' | 0.1 | 0.3 |
| 14' | .01 | |
| For conversion to lumens, multiply footcandles x 10. | ||
