condition mean min max 4 h after light 90.31335 89.6286 90.9981 8 h after light 74.36205000000001 71.4205 77.3036 12 h after light 51.341 47.9624 54.7196 4 h after dark 20.7085 20.4925 20.9245 8 h after dark 19.4895 19.2046 19.7744 12 h after dark 54.0216 53.5333 54.5099