In the Light Industrial Zone, one building or property identification sign per property which may be lighted or unlighted, freestanding or attached. The maximum area for a light industrial sign is 48 square feet with a twenty-five-foot front yard setback and six feet in height measured from the finished grade. No sign attached to a building shall project above the roofline. When multiple tenants occupy a single building, one additional sign per tenant is permitted, attached to the building, with a maximum area of nine square feet and a height not to exceed two feet.