| Title | 
	A Study on Changes of the S/P Ratio and CRI Based on the Wavelength Spectra of RGB 3-Chip LED Lightings  | 
					
	| Authors | 
	Jong-Oh Kim ; Hyeong-Seob Jo ; Uh-Chan Ryu | 
					
	| DOI | 
	http://dx.doi.org/10.5207/JIEIE.2017.31.2.017 | 
					
	| Keywords | 
	 RGB LED ; S/P Ratio ; CRI ; CCT ; FWHM ; Peak Wavelength | 
					
	| Abstract | 
	Since LED lightings were emerged as new lighting technologies, research has been conducted on the photopic vision, the scotopic vision and the mesopic vision under the LED lightings. The S/P(scotopic luminous flux/photopic luminous flux) ratios of the war  |