condition mean min max 4 h after light 21.284 20.5164 22.0516 8 h after light 19.25695 19.2278 19.2861 12 h after light 22.8614 22.7939 22.9289 4 h after dark 22.86145 21.8499 23.873 8 h after dark 26.5482 26.0352 27.0612 12 h after dark 26.53735 26.3461 26.7286