Signs Neon signs are also really easy to make in Photoshop 5. I'll show you both ways in case you have an earlier version.
Neon signs are basically bent tubes filled with glowing gas.
There aren't any sharp corners so pick a font the has rounded edges. I usually make the font color white. The NEON colors are produced by the filters in the next few steps. If you have photoshop 5 or higher you can do it this way. Make your settings similar to what you see here.