condition mean min max 0 h after light 23.0873 21.3976 24.777 4 h after light 518.347 160.051 876.643 8 h after light 31.6661 27.8306 35.5016 4 h after dark 14.730835 5.87377 23.5879 8 h after dark 136.9725 116.963 156.982 12 h after dark 100.78025 57.1665 144.394