channel letter illumination

What is an LED Viewing Angle?

As a signage professional, it is worth your time to know about an important feature of LED illumination. That is the “viewing angle”, and the meaning of that angle is sometimes misinterpreted.

Here is a capsule explanation. The textbook definition of a viewing angle is “the peak luminous intensity measured at right angles to the surface of the LED chip”.1 It is twice the number of degrees from vertical at which luminous intensity drops to half of the peak value.  

How To Improve Signage Night Visibility

Your potential customer just showed you his front lit channel letter sign artwork. You notice the design calls for burgundy vinyl covering the face.

What should you tell your customer about the potential night visibility performance of that color? Tell them the night visibility will probably not be optimal.