The biggest problem you will have is finding something bright enough with a good color.
Most are to blue for me.
These were fantastic
but they aren't available.
These are the latest
but they were not quite as bright but really good color and it looks like they aren't available now either.
I bought 40W LED to replace 20W incandescent and 20W LED for 10W incandescent and they were just about as bright.
This is not always true I have bought several 40W LED that were probably not even as bright as 10W incandescent.
So buy one and try until you find something you like then buy a set.
As for the base the G4 is pretty popular so if you don't have G4 bases consider buying converters from you base to G4 instead of trying to find your base.