“…The first is the near-UV and blue emission below 480 nm, including several peaks at 385, 419 and 439 nm, ascribed to the 5 D 3 -7 F J (J = 6, 5, 4) transitions. The second is the green and red emission above 480 nm, including several peaks at 492, 544, 593 and 629 nm, corresponding to 5 D 4 -7 F J (J = 6,5,4,3) transitions [17,18,27,28]. (For interpretation of the references to color in this text, the reader is referred to the web version of the article.)…”