condition mean min max 0 h after light 3.863255 3.55344 4.17307 4 h after light 5.139935 4.11441 6.16546 8 h after light 6.27345 5.7347 6.8122 4 h after dark 5.750425 5.1231 6.37775 8 h after dark 5.780775 5.13744 6.42411 12 h after dark 5.43565 3.1256 7.7457