Definitely not room darkening as advertised.  Put them in my bedroom to keep the room dark for better sleep.  The light comes right through them.  They also don’t close tightly so more light comes through.  Also the holes where the cords go through to adjust the height are very open which let’s even more light in.  Nice color though.  Shame I have to return them after going through the trouble of installing them and having to do a new installation for whatever I order next.