condition mean min max 0 h after light 0.077541 0.0 0.155082 2 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 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 0.0390641 0.0 0.0781282 12 h after dark 0.0369722 0.0 0.0739444