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Posted By: DamonHDI would like to see more of (3) with possible light piping from outside too: it offers a real saving when the sun is out like having solar PV but at probably a tiny fraction of the cost and space and complexity.
Posted By: fostertomThe cross sectional area of fibre optic would have to be at least as large as the light tunnel - more in fact! Unless light flux was mightily concentrated e.g. by fresnel lens, at the 'skylight' collection surface. It shocked me to discover how lossy fibre optic is, at piping light - I'd thought the whole point was that they were almost loss-less.
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