condition mean min max 4 h after light 6.56923 5.4985 7.63996 8 h after light 6.939925000000001 6.76015 7.1197 12 h after light 7.3136 7.2678 7.3594 4 h after dark 9.178899999999999 8.63068 9.72712 8 h after dark 8.504175 8.31093 8.69742 12 h after dark 8.903424999999999 8.74059 9.06626