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SpecialtiesClick Business Name for More Information. Since opening in 1975, E.D. Supply has become the leading supplier in lighting and electrical supplies on the Eastern Shore. Family owned and operated, the company has remained an integral part of the business community while establishing a tradition of quality service. Over the years, E.D. Supply has grown to seven locations in order to bring value added products and services closer to our customers across Delmarva. Electrical Distribution and ControlWith a tradition of quality products and service, E.D. Supply features the Square D line of electrical distribution and control. If you are looking for the finest in residential load centers, commercial panelboards or industrial automation, we have it in stock. Our sales professionals can help you select the right product for your application. Commercial LightingOur Commercial Lighting Department has all of the top brands available and the most experienced and competent staff on the Eastern Shore. We offer specification packages, as well as, in house design and value engineering for your lighting project. Going Green? We can show you how to save energy with more and better light