condition mean min max 4 h after light 9.2979335 8.130646 10.465221 8 h after light 9.1120475 8.301136 9.922959 12 h after light 8.8665475 8.67598 9.057115 4 h after dark 9.509749 9.368883 9.650615 8 h after dark 11.535783 11.230126 11.84144 12 h after dark 9.368883 9.368883 9.368883