There has been a lot of discussion among scientists and the general public about ultraviolet B (UVB) radiation, particularly in the 340-350 nm region. There have been concerns over the safety and possible health effects of ultraviolet B light-emitting diodes (LEDs) despite their widespread use in areas including medical treatment, water purification, and agricultural development. To clarify confusion and shed light on the dangers and advantages of using 340nm LED-350nm LED (UVB), this article will provide a thorough summary supported by scientific data and attempt to debunk some of the misconceptions about their safety.