condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.1356515 0.0 0.271303 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.142883 0.0 0.285766