Luminous tube transformers, more commonly called neon sign transformers or even gaseous tube transformers are pretty much the same as oil burner ignition transformers. They normally have higher output currents and voltages though. They come in several different shapes and sizes. There are several different output voltages like: 2,000V, 4,000V, 5,000V, 6,000V, 7,500V, 9,000V, 12,000, and 15,000V. Output currents are generally between 30mA and 120mA, 30mA and 60mA being the most common. These can be found at sign shops that deal with neon or sign shops that just save old junk. I found all of my neon sign transformers at a local sign shop that didn't even deal with neon. I was glad they didn't because they might have charged me for them if they had dealed in neon. These transformers make an excellent power supply for a Jacob's ladder and are commonly used on Tesla coils. Here are some pictures of some transformers that I have.
This big, shoebox sized transformer is a 15kV 30mA unit. Made by The Tube Light Company.
This one is an old 12kV 30mA unit. Made by General Electric.
The transformer pictured here is a bit smaller. 7.5kV at 30mA. Made by Jefferson Electric.
These two transformers have odd insulators, but they put off 5kV at 60mA. Two of these in series makes a great Jacob's ladder. They are "Franceformers", which are made by France.
