condition mean min max 0 h after light 181.586 177.334 185.838 4 h after light 172.025 163.579 180.471 8 h after light 130.53300000000002 122.944 138.122 4 h after dark 166.2275 157.081 175.374 8 h after dark 163.10649999999998 152.774 173.439 12 h after dark 179.23399999999998 173.965 184.503