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Fost Bulb PET Felt Acoustic Lamp


Fost Bulb combines unique aesthetics and smart functionality. Made from acoustic PET Felt material, the lamp dampens the sounds inviting you to sit down under its enveloping dome. A refined ribbed pattern on the lampshade will add a playful touch to any working, meeting or dining interior.

Acoustics and illumination

Thanks to its substantial volume and sound-absorbing material, Fost Bulb provides a gentle sound-dampening effect. Apply the lamp above meeting or dining tables to locally improve acoustics where needed.

Play with the colours

Fost Bulb is available in 11 PET Felt blends to blend in or stand out in any interior.

PET Felt colour blends


Fost Bulb 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 lamp is made of PET Felt - a sustainable and durable material manufactured from recycled plastic bottles. This technology brings many production steps down to a single moulding action, allowing to press a plain sheet of felt into any imaginable form.

With Fost, we have created a unique ribbed pattern on the lampshade, dictating its bold visual identity. This unique shape also adds sturdiness to the lamp and creates substantial volume, much needed for an acoustic lamp. 



  • Shell
    PET Felt
  • Inner plate
    Powder-coated steel
  • Fixture
    Steel cables + ceiling mount, 3 m
  • Electrical cord
    3-way, 3 m

Technical details

  • Weight
    3.1 kg
  • Fitting
    E26/27 (light bulb not included)

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 plate 
    White (RAL 9010)
  • Electrical cord

Care & Maintenance

Hi-Res images


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