I have been building custom playfield lights for my pinball machines for a little over a year and wanted to share a tutorial I just put together documenting the build process. These lights can be built using items ordered from Amazon and the lights cost around $60 a set to build. I created two versions of this video - a full version for those who want to build the lights and a short version for those who just want to quickly check out the process. A big thank you to Fytr for his forum post "Poor Man's Stadium Lighting" which contained a bunch of great information regarding building your own lights.
Short Version:
Full Version