condition mean min max 4 h after light 5.4317866666666665 5.306780000000001 5.57782 8 h after light 5.49033 5.257000000000001 5.70666 12 h after light 5.33754 5.19793 5.46767 4 h after dark 5.41793 5.34797 5.45975 8 h after dark 5.4757533333333335 5.34149 5.69365 12 h after dark 5.4791 5.28221 5.68429