In granting the use, the Zoning Hearing Board may attach reasonable conditions warranted to protect the public health, safety and welfare, including, but not limited to, location, fencing, screening, increased setbacks, the use of a retractable antenna where the extended height of the antenna exceeds 30 feet, and restrictions of the hours in which the antenna can be fully extended. The retracted height should be 30 feet or less, if possible.