condition mean min max 4 h after light 157.708921 137.026674 178.391168 8 h after light 144.1088745 139.765899 148.45185 12 h after light 201.632697 184.73739 218.528004 4 h after dark 287.7593075 202.541867 372.976748 8 h after dark 432.8218815 391.490163 474.1536 12 h after dark 191.341272 191.341272 191.341272