Luceplan Group is an award winning producer of consumer, technical, architectural and contract lighting fixtures, made in Italy. Luceplan is based in Milan with branches in New York, Berlin, Paris and Copenhagen. It operates in all the most advanced international market places with exports amounting to 75% of its turnover.

The Art Library designed by Toyo Ito, is located in the suburbs of Tokyo and stretches up a gentle slope with a big garden. The arch shaped architecture of the building gives a pleasant sensation of taking part in the surrounding nature and gives a spatial continuity with the interiors. The Costanza lamps in the suspension and table version light up the bookcases and the desks of the reading rooms. The gentle shapes of the lamps and their diffused light perfectly combine with the natural light which abounds in the spaces.