Morning

Does anybody have experience or comments using these filters?

Cokin says 'correctors of fluorescent light' = remove greenish casts.

I am going Italy - will be in Rome - doing some night photos - large monuments - lit up.

Will these filters be useful?
I don't mind buying them to experiment with.

Would prefer not having to do much work with software to remove casts etc (I'm not up to scratch with PS just yet)

Using Canon 40D.


thanks
Bronnie