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If you own an LED sign at some point you’ve probably wondered just how readable your sign may be. You have to consider text and image size, the amount of time each item is displayed, color scheme, viewer distance, time of day (or night), clouds, haze… There are so many things to consider that you may find yourself frustrated or even anxious, especially when you realize that you can’t be an objective observer because you already know what your sign displays.
Some things concerning the readability of your sign you just can’t control. Bad weather, construction zone signs, and even the power company’s utility vehicles can play havoc with viewing distance and line-of-sight. Location, while key for catching eyes, is a factor that has most likely been settled before you purchased your sign. However, overall readably with an LED sign from Lightking Outdoor is always in your control. All you need to do is use a color combination and font size that people can see from a number of distances regardless of the time of day.
Readability is all about finding the right combinations of background and text colors to fit the environment. A recent study conducted in Sweden sought to figure out the effects of color combinations, font size, and lighting conditions had on a person’s ability to read LED signs at varying distances. What they learned should help to ease concerns you might have about your own choices.
For the study, researchers assembled 101 students of varying ages. They were asked to view signs a number of distances at different times of the day and night. These signs displayed a wide range of color combinations and font sizes. The researchers then conducted a statistical analysis based upon the students’ responses.
The study revealed that color combination greatly affects a sign’s readability. In fact, the most readable combinations where white text on a blue, brown, or green background. These combinations were much more visible at a distance than black text on a white or orange background.
Since this study also used a number of font sizes with the color combinations. Researchers concluded that fonts of 300 mm (11.8 inches) could be read at longer distances during the day than at night. They also found that fonts of 200 mm (7.9 inches) had no significant change in readability between day and night.