Spacing for minimum footcandle (fc) illumination on level ground:
Note: 1fc for commercial projects / .3fc for residential projects
| Footcandles: | ||
|---|---|---|
| Distance | TD-12 | TD-18 |
| 4' | 1.2 | 1.7 |
| 6' | .27 | .53 |
| 8' | .08 | .53 |
| 10' | .15 | .27 |
| 12' | .08 | .18 |
| 14' | .03 | .09 |
| 16' | .01 | .03 |
| 18' | .01 | |
| For conversion to lumens, multiply footcandles x 10. | ||
