condition mean min max 4 h after light 7.293690000000001 7.10538 7.40711 8 h after light 7.42755 6.87823 7.827999999999999 12 h after light 7.376706666666666 7.022010000000001 7.6862699999999995 4 h after dark 7.4140733333333335 6.89732 7.70976 8 h after dark 7.248906666666667 6.82878 7.472460000000001 12 h after dark 7.237416666666666 6.789289999999999 7.4870399999999995