Sorry, I kind of cut off the far right hand side of the photo, good thing I'm a glass blower and not a photographer! This is a tight sign, dimensions are a mere 36" wide x 22" tall. It was a challenge to get all that glass in there!
This sign is 48" wide by 18" tall. The holes for the gradient were individually hand drilled and the gradient is back lit by three separate pieces of neon. There are two different colors of vinyl lettering behind the neon, the vinyl was cut courtesy of Sign Art Studios check 'em out here. Thanks Dan! This is a pic from the construction phase of the sign...
wonderful use of neon in NYC, showing that no matter how many LED's you stuff in a box, it will never replace the soft, pleasant glow of a vacuum tube.