condition mean min max 0 h after light 3.19646 0.0 6.39292 2 h after light 0.0 0.0 0.0 4 h after light 2.910535 0.0 5.82107 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0