About SANO TAKEHITO
About ITO YUI
About light emitting diode
About lighting fitting
About incandescent lamp
About fluorescent lamp
About comparative test
About illuminance distribution
About luminous flux
About consumed electric power
About hue
About homogeneity
About surface of wall
About white
About black
About red
About green
About blue
About power efficiency
About reflectivity
About light emitting diode
About Light sources,lighting apparatus
About 発光ダイオード
About LED
About 照明技術
About 実験
About 研究