condition mean min max 4 h after light 173.5 173.5 173.5 8 h after light 187.6 138.7 236.5 12 h after light 303.75 261.5 346.0 4 h after dark 438.04999999999995 399.2 476.9 8 h after dark 635.55 625.9 645.2 12 h after dark 604.5 489.2 719.8