I've got an Advance 7C350P24 cap (I think it's a cap) that I could take home and try if you guys think it would work?

It says 35 MFD 240 VAC 50/60 Hz on it if that makes any sense to anyone

I've also got an Advance 7C550P24 that says 55 MFD 240VAC on it. These both came from HPS ballast systems though.

Won't work?