Adequate street lighting facilities, in accordance with these Subdivision Regulations, shall be provided by the subdivider for all public streets in any subdivision. Insofar as practical, all street lights shall be mounted directly on ornamental standards which shall be supplied with electricity by underground services. Should it be necessary to suspend a street lamp on cables between standards, such standards shall be of the ornamental type and shall be supplied with electricity by underground services. Should the electric utility company impose an installation charge for the street lighting as herein provided, the payment of that charge shall be the responsibility of the subdivider. All street lighting shall be approved by the City Manager prior to installation.