First off this was designed for luxrender so most of my texturing went in with that but i did the best i can to make it cycles compatible for you guys
EDIT: IT IS FULLY CYCLES READY AND TEXTURED sorry for the confusion ... if you want the luxrender (1.3DEV 10/6) .blend send me a PM
FIRST OFF you can select ANY number to be your active number .... you have to select the active curve, bring the curve width back down, change its material to "off" then select the number you want, change its material to "on" than make the line a fair thickness to simulate a neon glow
CYCLES does not support homogeneous volumetrics (or any volumetrics for that matter ...) so unlike luxrender you have to make the line thicker and to TRY and simulate the cloudy glow i used a half-cylinder and an emission/transparent material ... not the best but feel free to change it about!
OH and its hard to see but there IS a grid anode (er cathode ... not my era) with an included (packed) grid texture and its simply a transparent over matte with the texture as a mask ... its my texture so use as you wish!