Lights when there shouldn't be!

I have a scene for the blenderguru opensource movie tribute competition and I appear to have lighting some where that I cant change or even trace where it’s coming from! I have removed world lighting etc. and still have it even trying boxing the entire scene in a black box! Is there a way to search for emission shaders? and trace it that way? here’s a link to the rar of the blend file …
any help would be great…

In your scene there is a linked library (Tower01.blend) that of course I haven’t, so I can see only a purple thing.
You should make the object ‘local’ before saving for sharing.

But anyway, maybe the light comes from the ambient occlusion you have activated.


Doh! I have defiantly done this before! Thanks paolo