In 1912, Clarksville Connected Utilities, formally Clarksville Light & Water Co. had the following ad in the Clarksville Democrat advertising the New Mazda Lamp: "For lighting large rooms, such as stores, churches, halls, etc. we have to offer the NEW EDISON TYPE C MAZDA, (made only in units of 200 candle power and larger) used only with special fixture (low in price) and this lamp is not only the most efficient lamp on the market to day in the way of cost for delivery of light, but is GUARANTEED to give at least 1000 hours actual burning service, (or will replace same) and also produce a light that is soft and white, the best known to-date. Ask us about it. We will take pleasure in installing these new fixtures at a price to you, that is actual cost to us."