condition mean min max 0 h after light 803.73 795.962 811.498 4 h after light 836.328 836.136 836.52 8 h after light 611.546 593.385 629.707 4 h after dark 711.7395 692.907 730.572 8 h after dark 831.8340000000001 812.727 850.941 12 h after dark 823.3199999999999 811.814 834.826