“…White-light-emitting diodes (WLEDs) are considered as the next generation of green lighting sources because of their low energy consumption, high output efficiency, and environmental friendliness, compared with traditional incandescent and fluorescent lamps [ 1 , 2 , 3 , 4 ]. At present, there are two methods are available for generating white light: the multichip combination method, in which red, green, and blue LED chips are used in combination, and the light conversion method, in which various phosphors are excited by blue, ultraviolet (UV), or near-UV LED chips [ 5 , 6 ].…”