condition mean min max 4 h after light 9.961396666666667 9.87491 10.035210000000001 8 h after light 9.811286666666666 9.61112 9.95705 12 h after light 9.84326 9.79113 9.871269999999999 4 h after dark 9.8345 9.63885 10.02285 8 h after dark 9.937393333333333 9.72598 10.06971 12 h after dark 9.721589999999999 9.670119999999999 9.79509