Viewing distance is one of the most important factors needed to determine the correct size of most LED signs. As a general rule: 1” character height is viewable from up to 50’ away. However, if the target audience is moving, then another factor, time, is required. An average of at least 3-4 seconds is required for a moving audience to recognize and comprehend 6-8 groupings (frames) of content on an LED display. The following chart lists the maximum time an audience will have to view an LED sign with specific character sizes. For example, an audience in as 35 mph speed zone will have 9.7 seconds to view an LED sign with 10” high text.