condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.068891 0.0 0.137782 12 h after light 0.13589895 0.0833309 0.188467 4 h after dark 0.05491 0.0 0.10982 8 h after dark 0.1506155 0.137584 0.163647 12 h after dark 0.09979745000000001 0.0912339 0.108361