As part of a poetry festival in Madrid, Luzinterruptus stuffed 1000 envelopes with poems and small lights and hung them in a garden outside the festival. On the final night of the event, people could take an envelope as a keepsake or address the envelope to a friend or loved one. Luzinterruptus collected the envelopes and sent them off. You can see pictures of preparing the poems and lots of photos of the installation here (the site is written in Spanish, but there’s an English translation if you scroll down).