condition mean min max 0 h after light 0.824235 0.0 1.64847 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 0.54053 0.0 1.08106 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0