Hi, A colleague of mine at work has this idea of using a focusing lens to focus the visible light into a optical fiber and guide it to some destination, e.g. room with no windows. I have no experience in optics, or in QED (only some "layman" knowledge of monochromatic light and its interactions with surfaces/electrons). Is it possible to guide the "chaotic" visible light down the fiber? What are the affects on light intensity, energy, reflections, refractions and so on, when performing such an experiment? Cheers!