condition mean min max 4 h after light 2.595325 0.0 5.19065 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 2.27709 0.0 4.55418 8 h after dark 1.763015 0.0 3.52603 12 h after dark 1.86476 0.0 3.72952