I am also wondering weather nylon cable has the same properties?
Fibre optic isn't just a single cable - to work at all well it has to be a tube of high refractive index material with a core of lower refractive material. Just nylon line wouldn't do this BUT you could try after all it's not going to cost a lot.
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thank you so much i found i nice set on ebay for somthing i am building for school...i might not be able to get it in to a competition for the school... either way it will eventualy end up on instructables and feel free to subscribe:)
For all I know for nylon (monoline to be precise) is that the thinner the diameter the better.
Where in the world are youIn the UK Rapidonline sell optical fibre.
My kids and I get the remaindered fibre christmas trees and dissect all the fibre from them. Nylon cable doesn't work in my experience. Steve