These are not blackout curtains.  I just got the first two panels hung yesterday and decided to add two more panels, which I ordered.  All four panels will be returned because to say these are blackout curtains is not true.  My room was more light than ever with these curtains.  Wayfair, you should look at these and either change the name to curtain panels, or discontinue to brand.  They would also not be considered room darkening curtains.  I am disappointed.