condition mean min max 1 h after light 19.021621876666668 16.03111861 23.67389455 3 h after light 19.08153606333333 15.34753731 21.54714885 5 h after light 18.88149825 16.74923078 21.47208372 7 h after light 19.216836383333334 18.2109121 21.16740611 9 h after light 20.498406256666666 18.53314947 23.97395945 11 h after light 18.038203643333333 15.52116972 19.78941106 13 h after light 20.288339543333333 16.16369933 25.54438186 15 h after light 17.887644743333333 16.76846233 19.51682463 1 h after dark 21.604685403333335 17.41048655 24.84066289 3 h after dark 20.788843956666668 17.67394708 24.96696644 5 h after dark 19.164464983333332 17.65986872 21.82600517 7 h after dark 24.759171023333334 18.90284972 29.99625527