condition mean min max 4 h after light 7.696593333333333 7.489730000000001 7.95533 8 h after light 6.8419533333333336 6.78388 6.94612 12 h after light 7.114793333333333 7.013660000000001 7.17408 4 h after dark 6.526586666666667 6.44948 6.64465 8 h after dark 6.52851 6.38701 6.6109 12 h after dark 6.854640000000001 6.59278 7.115360000000001