The theme of Moscow's fifth Biennale is "More Light" and it features more than 70 artists.

Curator Catherine de Zegher says the artworks range from the philosophical to the literal.

SOUNDBITE: Catherine de Zegher, curator, 5th Moscow Biennale, saying (English):

"Art is also in itself invested in light, so I wanted to do something where also we could speak about the role of art in society and how it enhances our life ."

One of the largest installations is called "Waste Not" by Chinese artist, Song Dong and comprises items collected by his mother over the course of 50 years.

SOUNDBITE: Song Dong, artist, saying (English):

"'Waste Not' was my mother's generation's idea for the daily life. They said, 'We should waste not, because if you waste a lot, in the future you haven't anything to waste'. So I think now for the modern life - we waste a lot."

A continuous graphic pattern on the glass wall of a conference room, took artist Gosia Wlodarczak more than 200 hours to create.

And "Dialogo Iluminado" is a collaboration of a trio of artists.

The Moscow Biennale of Contemporary Art runs for one month.