From my experience, I have had beautiful results with running 8 inch 22W circline fluorescent lamps on Advance LC-25-TP preheat fluorescent reactor ballasts. When running at the correct 120V 60Hz supply they are rated for, I have seen them draw roughly 25W or so with ballast losses included and also draw somewhere around 360mA without a power factor correction capacitor, which is close to the 380mA lamp current required of them at least in North American terms.
Here is one on eBay for a pretty cheap price:
https://ebay.us/m/eAnMcBI have known about them being a pretty good choice because I have understood 8 inch 22W circline fluorescent lamps to have similar electrical characteristics to the F20T12 fluorescent tube and have read accounts of collectors saying that the Advance LC-25-TP reactor ballasts were able to properly power F20T12 fluorescent tubes.