condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.271303 0.0 0.542606 12 h after light 0.2197575 0.0 0.439515 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0