Volta lamp in terracotta by marta bonilla dimensions: d28 x h41 cm materials: terracotta, clay. Volta lamp in terracotta: piece modeled by hand in red clay. The piece has a burnished finish, giving it a satin look. All our lamps can be wired according to each country. If sold to the usa it will be wired for the usa for instance. up to 250v (europe/uk standard).