Though I am a great believer in Lancôme products, this one really didn't do it for me. It smelled great, and was very lightweight but that's about it.
The price is pretty steep for such a small tube, even for Lancôme.
I have had dark spots for about 6 years now (yes, since the age of 34!), and haven't found anything to alleviate the darkness.
Sorry to say, but this product was a fail for me.