The bulbs inside scanners (before transitioning to LED, anyway) were cold cathode fluorescent tubes that emit a fairly wide bandwidth of light. They were purpose-built to produce a very specific type ...
Q: I have a 2001 Ford Windstar. I went for a state inspection and failed because my back-up lights don’t work. I replaced the back-up light bulbs on both sides, but they still don’t work. I am not ...