condition mean min max 4 h after light 4.937085 4.31549 5.55868 8 h after light 5.536265 5.42648 5.64605 12 h after light 6.197934999999999 5.99635 6.39952 4 h after dark 7.634125 7.2249 8.04335 8 h after dark 6.07665 5.88043 6.27287 12 h after dark 6.106755 6.08074 6.13277