The Catellani and Smith Alchemie T table lamp has two discs which can be moved parallel to each other with a light hand movement on a lamp base with rail. One is alabaster and the other is brass. They each have a diameter of 26 cm and symbolise the sun and the moon. The brass disc like the moon can completely or partially cover the alabaster disc depending on its position on the rail. The lamp base with rail, on which the discs can be moved, is made of Pietra di Medea marble. An LED strip with a colour temperature of 3,000 Kelvin warm white is integrated as a light source. There is an on/off switch at the base of the lamp.