[theboulevardier]

We have done something similar at home. We live in an apartment with a small shared central courtyard, which is lit up (though not extremely bright) when someone walks through it. Our bedroom has those crappy Ikea Venetian blinds, which are terrible at blocking light and it's a rental so we can't change them. Instead we cover the blinds with a dark bedsheet and that does a great job of keeping the light out.