The curtain panels are listed as "room darkening", but they're definitely not what I would consider to be black out panels.  They were on the sheer side and I ended up having to purchase panels to go behind them.  They're for my front room and I didn't want anyone to be able to see inside at night when the lights were on.  They're very pretty and the fabric is good quality.  They hang nice and evenly.  However, like I said, don't expect them to be black out panels.