condition mean min max 4 h after light 20.908313999999997 18.093659 23.722969 8 h after light 17.318923499999997 17.06301 17.574837 12 h after light 19.9431665 19.013565 20.872768 4 h after dark 18.468121 17.06301 19.873232 8 h after dark 18.6141485 13.93913 23.289167 12 h after dark 23.91461 23.91461 23.91461