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 0.0 0.0 0.0 4 h after dark 0.446847 0.390554 0.50314 8 h after dark 0.2499175 0.0 0.499835 12 h after dark 0.0 0.0 0.0