The answer to this question can vary depending on the activity, the position, the target customers and other factors. In general terms, these guidelines can help while selecting the right sign:  The best display is the one that attract the higher number of customers and transmit the image of professionalism required by the entrepreneur.  The sign must be visible and easy to read for car-drivers and pedestrians passing by the business.  The bright board must be attractive and suitable for the business.  The sign must recall to the usual customers the presence and the position of the commercial activity plus providing the potential customers with an important visual indicator to associate with the products/services available.  The LED panel should be as big as possible, depending on the existing space.