Is the principle of ultraviolet light emitted by LED the same as that of traditional mercury lamp?

yes, the traditional mercury lamp (fluorescent lamp) is that the inert gas in the lamp is excited by voltage to emit ultraviolet rays, and then the ultraviolet rays excite the fluorescent substances on the inner wall of the lamp to emit white light. The ultraviolet rays emitted by led are emitted by using different chip components with different wavelengths in the process of electron hole emission in pn junction, and the chip components with a specific component are used to emit ultraviolet rays. Therefore, the principle of light emission is different.