condition mean min max 4 h after light 12.204784 11.298638 13.11093 8 h after light 10.1875955 9.651746 10.723445 12 h after light 10.374468 9.668262 11.080674 4 h after dark 8.704163 8.599414 8.808912 8 h after dark 9.1565575 8.969341 9.343774 12 h after dark 8.460755 8.460755 8.460755