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 0.3515335 0.0 0.703067 4 h after dark 0.311699 0.0 0.623398 8 h after dark 0.915715 0.0 1.83143 12 h after dark 0.0 0.0 0.0