The measured efficiencies (0.07–0.28%) are lower than several values reported in the literature: 0.09–1.47% with 20 natural dyes [13], 0.03–1.17% with pomegranate leaves and mulberry fruit dyes [1], 0.81% with zinc chlorophyll dyes [14], 0.88% with chlorophyllins dyes [15], 0.54–0.97% with K. japonica and R. chinensis flower dyes [4], and 1.47% with Lawsonia inermis seed dyes [16]