Electrophoretic deposition (EPD) is a technique in which charged particles dispersed in a liquid are deposited onto a substrate under the force of an applied electric field. EPD has many advantages besides its benign processing conditions, such as a high uniformity, the ability to produce deposits fast and continuously, and a low level of contamination. For the past 20 years, my research group has investigated EPD of a variety of micron and, more recently, nanosized powders, including phosphors for high-resolution information displays, zeolites for fabrication of modified electrodes and supported membranes, single-walled carbon nanotube structures, and electrocatalysts for a thermochemical hydrogen production process. This talk will focus on the application of EPD to deposit phosphor powders, particularly for white solid state lighting. We have used EPD for depositing micron-sized and ~100 nm phosphors for a near UV-LED-based light source for improved white light extraction efficiency. It was demonstrated that EPD could be used to deposit red, green, blue, yellow and orange phosphors to generate white light by either depositing a phosphor blend or layer-by-layer in a sequential method. Although nanoparticles of a variety of materials have been coated by EPD, there have been few direct comparisons of EPD of nano- and micron-sized particles of the same material. EPD of nano-, nano core/SiO2 shell and micron-sized (Ba0.97Eu0.03)2SiO4 phosphor particles for application in a near-UV LED-based light source was compared in our work.