Which headlight bulb??

So I noticed last night that my dipped beam light was out.

I went to halfords this morning to get what I thought was the right replacement bulb only to find that the one that's in at the moment only has a single prong fitting where the replacement one has two prongs? In fact the new bulb seems bigger than the one that's in and doesn't look like it will fit anyway.

I've searched the tinterweb and all the results seem to look like the two prong style.

Does anyone know what type of bulb should be in a 2005 wrx??

H7 bulb aint it?

Marshffs wrote:

H7 bulb aint it?

That's what I bought but it's nothing like the one that's in. Like I said there is only one connecting prong on the bottom instead of two.

H7 one prong

H7  bulb much cheaper at boyes stores than halfords

Hb3 for the dipped in a blobeye And h1 for full beam