condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.2665985 0.0 0.533197 12 h after light 0.243114 0.0 0.486228 4 h after dark 0.0 0.0 0.0 8 h after dark 0.1064865 0.0 0.212973 12 h after dark 0.0 0.0 0.0