festoon

Searched and found a few threads but none that specifically tells me what festoon led bulbs i need for which particular lights i am changing... http://www.autobulbsdirect.co.uk/Festoon-LED-Bulbs/ found this site... are these the correct ones i need? if so could someone be so kind as to...

ive seen a few people using these led festoon bulbs to light up the rear registration plate, think they come standard on the new beamers to and am thinking about putting some in mine. think they look quite smart. has anyone put these led bulbs into there car yet and if so do you need the canbus...