condition mean min max 4 h after light 9.619803333333333 9.57951 9.65385 8 h after light 9.71332 9.594380000000001 9.84403 12 h after light 9.917306666666667 9.71706 10.064110000000001 4 h after dark 9.67878 9.64644 9.733889999999999 8 h after dark 9.651729999999999 9.63003 9.66292 12 h after dark 9.421956666666667 9.356689999999999 9.53627