Ukwelashwa kwe-UV LED kuyindlela esebenzisa ukukhanya kwe-ultraviolet ukwelapha noma ukuqinisa izinto. Le nqubo ihlanganisa ukudalula okokusebenza kuma-UV LED diode akhipha ukukhanya kwe-UV. Uma ukukhanya kwe-UV kushaya into, iqala ukusabela kwamakhemikhali okwenza into ibe lukhuni noma ixazulule. I-UV LED diode iphuma ukukhanya kwe-UV-A, i-UV-B, ne-UV-C, okuhambisana nobude begagasi obudingekayo ukuze kuqalwe inqubo yokwelapha.