condition mean min max 0 h after light 0.1621485 0.0 0.324297 2 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.323481 0.0 0.646962 8 h after dark 0.1758795 0.0 0.351759 12 h after dark 0.0 0.0 0.0