The Siam 4L is manufactured by the Spanish manufacturer Bover and is based on a design by Joana Bover from 2010. The fixed pendulum bar of the Bover Siam 4L is made of metal in satin nickel. On the pendulum bar there are three horizontal lamp arms, mounted at different heights, which can be individually aligned and hold a total of four lampshades. The light from this ceiling lamp is emitted directly downwards through a methacrylate diffuser. At the same time, it spreads upwards to the ceiling for indirect lighting. The Bover Siam 4L has a diameter of 176 cm, the total height of this ceiling lamp is 100 cm. This lamp is available in the shade colours white and cream. The Bover Siam 4L has E27 sockets and can be operated with both compact fluorescent lamps and LED retrofit lamps. The ceiling canopy of this on-site dimmable lamp has a diameter of 20 cm.