This project shows you don't need fancy tools to transform a fiber optic lamp. Most of the time, swapping in a simple LED can make a huge difference. Fiber optic lamps had their heyday decades ago. If the power in the fiber is too high, Rayleigh scattering becomes significant and causes cross-talk between the channels in your wavelength division multiplexing system (and other degredations). But that limit doesn't really apply to. Fiber optic lighting uses optical fibers to transmit light from a remote source to the end location.