condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.1800105 0.0 0.360021 4 h after dark 0.1596995 0.0 0.319399 8 h after dark 0.15825 0.0 0.3165 12 h after dark 0.0 0.0 0.0