I have seen light pipes which "conduct" sunlight from an outdoor receptor to the dark recesses of buildings ... but they all seem to be awkward bulky metallised tubes. Is it not possible to achieve the same effect with fibre optics? Could one not focus the light at the receptor into a fibre.. and spread it out again at the appropriate point. I have seen posts about the capacity of fibres to carry data .. but not about the capacity to carry simple white light.. What would limit the amount of light (lumens?) which could be transported?