condition mean min max 4 h after light 8.873649 8.811381 8.935917 8 h after light 9.0259845 8.213504 9.838465 12 h after light 10.2618385 9.770005 10.753672 4 h after dark 8.823225 8.757144 8.889306 8 h after dark 7.846129 7.442081 8.250177 12 h after dark 8.265319 8.265319 8.265319