The Numperplate lights on the Elise and Exige S2 as well as the Evora and the Exige V6 have the tendency to break quite often.
Apart from that.. they look a bit dull, certainly when your car has the LED rear lamps.

This is a pair of direct replacements for the original Numberplate lamps, but rather than normal bulbs, these are LED's. They last much longer than normal bulbs and the light looks a lot better!

The outer shape of these lamps is the same as the OE parts.
These lamps come with all EU approvals you'd need to replace the originals.