Festoon in the boot?

So I've gone through all my interior lights (all push fit over head, behind the sun visors, doors etc) even the numberplate ones are push fit but in the boot its a festoon.

Just wondering of the size of it as it seems a smallish one?
Want to get a bright white one for the boot (although I'm still swaying to carry the blue into the boot)
 
Best off measuring it, the type of interior lights in these clios seems to be completely random from one car to another
 
Definately head or tails!

My 200 has the 501 bulbs throughout excluding the glove box. And i dont have a set of lights in my roof above the rear seats like some do :-S