Precision electric dipole moment (EDM) measurements of fundamental particles are extremely sensitive to Beyond Standard Model sources of charge/parity violation required for generation of the observed matter/anti-matter asymmetry in the universe. I will give a brief overview of the relevant theory and the general experimental principles of such searches. I will then focus on an experiment to measure the neutron's electric dipole moment at Oak Ridge National Lab, and especially the optimization of the collection efficiency of the scintillation light used to measure the neutron's precession frequency.