condition mean min max 4 h after light 3.879975 3.24621 4.51374 8 h after light 2.459425 2.25551 2.66334 12 h after light 2.55075 2.20176 2.89974 4 h after dark 15.515666666666666 13.428 17.3923 8 h after dark 10.559479999999999 9.40589 12.5436 12 h after dark 11.7585 10.7395 13.3865