According to the calculation of 3m floor, there is sunshine all the year round above 14 floor. The algorithm is as follows: when the sun shines on the tropic of Capricorn, the minimum illumination angle is 17.5 degrees, and the height of the building in front is 54 m. Calculate the tangent value. If the first floor of your building will not be blocked, the minimum building spacing is 17 1.27. Then the difference is 12 1.27 meters, so from the tangent, it can be seen that the building with 38.24 meters will not be blocked, that is, there will be no problem of being blocked above 39 meters, so the lighting from 14 floor is the best.