Hi, Thanks for your query. Your daughter was rightly given phototherapy to reduce her levels of bilirubin (measure of jaundice). The duration of phototherapy depends on the levels of the bilirubin and the gestational age of your daughter. The complexion of a child does change on exposure to light. You need not worry about the complexion as it is going to change a lot as the child grows and gets exposed to sunlight, etc. We are more interested in the well-being of the child in the initial days which is the prime concern of the doctors. Wishing you all the best.