Umbala we-fluorescent we-UVyona ngokwayo ayinambala, kwaye emva kokufunxa amandla okukhanya kwe-ultraviolet (uv-365nm okanye uv-254nm), ikhupha amandla ngokukhawuleza kwaye ibonakalise umphumo ocacileyo wombala we-fluorescent. Xa umthombo wokukhanya ususiwe, uyema kwangoko kwaye ubuyele kwimo yokuqala engabonakaliyo.