Umbala we-UV fluorescentuqobo lwayo alunambala, futhi ngemuva kokumunca amandla elambu le-ultraviolet (i-uv-365nm noma i-uv-254nm), likhipha ngokushesha amandla futhi likhombisa umphumela ocacile wombala we-fluorescent. Lapho umthombo wokukhanya ususwa, uyema ngokushesha bese ubuyela esimweni sokuqala esingabonakali.