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 0.1318385 0.0 0.263677 4 h after dark 0.01362515 0.0 0.0272503 8 h after dark 0.061306 0.0 0.122612 12 h after dark 0.0 0.0 0.0