Velella ceiling lamp, 1967 Achille and Pier Giacomo Castiglioni Steel plate, opaline glass, 7 13/16 x 17 3/4 x 17 3/4" Manufactured and lent by Flos   The incandescent bulb at the center of the fixture is completed by a fluorescent circular tube which is hidden within the opaline glass. The lamp thus gives a mixture of warm and cool light, both reflected and diffused.