I- bili light iyithuluzi elilula lokwelapha i-jaundice esanda kuzalwa (hyperbilirubinemia). Amazinga aphezulu e-bilirubin angabangela ukulimala kobuchopho (i-kernicterus), okuholela ku-cerebral palsy, i-neuropathy yokuzwa, ukungaboni kahle kanye ne-hypoplasia yamazinyo. Ukwelashwa kusebenzisa ukukhanya okuluhlaza okwesibhakabhaka (420–470 nm) okuguqula i-bilirubin ibe uhlobo olungakhishelwa umchamo nendle. Izibuko ezithambile zifakwa enganeni ukuze kuncishiswe ukulimala kwamehlo ngenxa yokukhanya okukhulu.