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Fost Large PET Felt Acoustic Lamp Designed by De Vorm


A unique addition to our lighting collection: Fost Large PET Felt Acoustic Lamp. A new take on Fost PET Felt Acoustic Lamp, Fost Large comes with an impressive 118 cm lampshade and high-quality spheric LED light. This new version is designed to enhance any office space with its sleek, modern design and outstanding acoustic qualities.

Large acoustic lampshade

The big size of this lamp makes it perfect for use in spaces such as offices, public spaces and even conference rooms. The lamp measures 118 cm in diameter, making it a statement piece in any room. Fost Large PET Felt Acoustic Lamp offers sound-dampening properties, making it an excellent choice for spaces where noise reduction is essential. The PET Felt lampshade material absorbs sounds, reducing ambient noise and creating a quieter, more peaceful environment.

Duotone design

Available in 11 unique blends, Fost Large is suitable for any setting. Its duotone design, with contrasting inside and outside colours, creates a special visual effect drawing attention to the lamp and inviting to sit down under its enveloping dome.  

PET Felt colour blends


Fost lamp in projects 

We are always curious to see how our products work in completed interiors. Have you applied or seen Fost in any project? We’d love to hear from you

PET Felt Technology

The lampshade of the Fost Large is made from PET Felt - a sustainable and durable material manufactured from recycled plastic bottles.

PET Felt is a soft, though strong material with a great acoustic performance. It is both recycled and recyclable. The design of the Fost Large allows a number of production steps to be reduced to one smart 3D pressing technique. Learn more about this innovative technology.



  • Shell
    PET Felt
  • Inner inlay
    4-way stretch cloth
  • Fixture
    Steel cables + ceiling mount, 3 m
  • Electrical cord
    3-way, 3 m

Technical details

  • Voltage
    120V - 240V
  • Power
  • Light output
    1400 Lm
  • Colour temperature
    Warm white, neutral white (3000K, 4000K)
  • Dimmable
    DALI dimmable

Installation guide

  • Find the installation guidelines here


  • Shell
    Yellow, Pink, Marine, Turquoise, Dark Green, Green, Dark Grey, Olive, Beige, Light Grey, Brown*

    *Due to the recycled content of the PET felt, minor colour differences may occur. 
  • Inner inlay 
  • Fixture
  • Electrical cord

Care & Maintenance

Hi-Res images


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