condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0256979 0.0 0.0770937 12 h after light 0.0168899 0.0 0.0506697 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