After knowing that most North American HID ballasts often have a voltage range between 120v and 480v, I have noticed that most North American fluorescent ballasts are designed for mains supplies between 120v and 277v. However, when searching for 480v fluorescent ballasts, I have noticed that they are mostly electronic T5 HO ballasts. I am wondering if there were 480v magnetic fluorescent ballasts that existed for other types of fluorescent tubes such as VHO, HO, slimline, or T17 or even 480v magnetic ballasts designed for normal T12 and T8 bipin fluorescent tubes, T5 fluorescent tubes, and 480v magnetic ballasts intended for CFL lamps.

347v fluorescent ballasts were also common in Canada. You used to be able to get 347v magnetic F40 ballasts in places like Home Depot here.

As for higher voltages, a lot of older Canadian catalogues had 600v fluorescent strips and turrets available. Usually in high wattage formats like SL/HO/VHO/PG where the high voltage made sense. For lower wattages, 347v was an option. I've saw a 347v PL13 ballast once, it was larger than the lamp it was designed to run.

 Yes ! According to my GE Ballast and Energy Systems catalog #7200 GE made one and only one . It's GE catalog # 8G3899WF . It's a low temp rated , 2 lamp high power factor magnetic ballast for running either F72PG17 OR F96PG17 Power Groove tubes .

 specs are : min starting temp -20°f , line current .95amps , input watts 450 , dimensions : 14 5/16"L X 2 11/16"H X 3 3/16"W Ballast circuit type is series lead , sound rating "D"

These high (I don't mean the technical term meaning 1kV and above, but "higher than usual") voltages are used mainly in larger installations, where is not much use for the lower wattages, so these were really a specialty items. So it makes more sense to use a standard 120V ballast and some generic step down teansformer. Either had way wider use than just the low wattage light on that high voltage (the 120V ballast is obvious, transformers down to 120V are used for control circuitry in those higher voltage machines), so are ready made in higher volumes, co became way cheaper and more readily available. Plus often the task is a group of lower power lights, so these then could share one common step down transformer.

Since the GE ballast was rated for temps down to -20°f , I'd guess it was designed for fluorescent street lights .

Since the GE ballast was rated for temps down to -20°f , I'd guess it was designed for fluorescent street lights .

IIRC most VHO and even HO ballasts are rated down to that temperature. It's why most outdoor fluorescent lighting is usually HO.