I was at the Houston Rodeo last night and saw Jake Owen play. He had a guitar where the fret markers were actually lit up in blue. I don't know if this was for show or more an aide to the performer when the lights would go out. I used to go to a lot of big shows but haven't been in a while. Is this something common these days? I recall years ago seeing a training guitar with LEDs that would help you learn the scales, but this was just a traditional guitar. Also, I didn't stay the whole time, but for a country show, the telecaster was underrepresented.