condition mean min max 4 h after light 0.6960505 0.461631 0.93047 8 h after light 0.6506605 0.628222 0.673099 12 h after light 0.637269 0.460354 0.814184 4 h after dark 1.282905 1.22457 1.34124 8 h after dark 0.802712 0.739346 0.866078 12 h after dark 0.9141285 0.835688 0.992569