hi hi,
i saw those before too, they very at the bottom right?
they are very very cheap!!!
it won't make a difference whether it's use for PL or FL, most important is the rating is correct. the brand is actually quite good, maybe they just clearing stock. i never buy those 55watt e-ballast is because so far i have never use 55watt PL tube before. one thing, so not many (maybe there is not) peole use 55watt FL, if there is one, it should be around 5-6 feet long.
i never buy e-ballast from that shop before.