condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.04551825 0.0 0.182073 3 h after dark 0.0 0.0 0.0 6 h after dark 0.037063 0.0 0.111189 9 h after dark 0.0 0.0 0.0 12 h after dark 0.09828025 0.0860485 0.110512