Post Syndicated from Lennart Poettering original https://0pointer.net/blog/iq-light-final.html

A small, final followup on the blog stories about the mexican style IQ Light:

After some unsuccessful experimenting with materials like Polystyrene
(cracks too easily), I settled on 0.3mm white Polypropylene which is both easy
to work with and easy to find. The light becomes a little bit blue-greyish
cold. I bought Ibico PolyOpaque
report covers for this purpose, which you can get at German Staples stores.
You can get it in 25, 50 or 100 DIN-A4 packs. Because only two full-size
pieces can be cut from a single A4 sheet and you need 30 pieces you need at
least 15 sheets for a single full-size lamp. I built 10 lamps in various sizes from
this material and it seems to work pretty well.

Have fun!