condition mean min max 4 h after light 254.112409 248.438917 259.785901 8 h after light 270.762896 268.022961 273.502831 12 h after light 297.5142225 251.462826 343.565619 4 h after dark 261.401114 225.718751 297.083477 8 h after dark 190.7135005 103.592543 277.834458 12 h after dark 213.421271 213.421271 213.421271