condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.1136365 0.111767 0.115506 8 h after light 0.1714705 0.112153 0.230788 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