The Marset Plaff-on! 20 is a wall and ceiling lamp with a diameter of 20 cm. It consists of a lacquered aluminum ring around a mouth blown opal glass diffuser. Most of the light is emitted directly downwards. The ring around the diffuser filters the light upwards to create a halo on the ceiling. In addition, it serves as a reflector for the light emitted to the side. The aluminum ring is white on the inside and black or silver-grey on the outside. The wall and ceiling lamp Plaff-on! 20 is available in a halogen and an LED version. The halogen version can be operated with halogen lamps or LED retrofit lamps. The LED version contains an integrated LED module. Both versions can be dimmed on site.