The scientists tested different phosphors that glow red, green, and blue when hit with near-ultraviolet light. They wanted to see which ones would work best in a special kind of screen called a phosphor-liquid crystal display. They found that K5Eu2.5(WO4)6.25, SrGa2S4:Eu, and BaMgAl10O17:Eu are good choices for making this kind of screen. They compared the colors and brightness of these screens to regular screens and found they were similar.