Under the warm UV rays

We are told as adults that we want to minimize our UV exposure to
protect our skin. It turns out that UV has beneficial purposes as
well - it helps to cure jaundice, otherwise known as buildup of
biliruben. The light has an interesting effect on the biliruben
molecule, changing its conformation, so that it is more soluble in
water. This allows the child to more easily pee it out. Hence Peanut
gets to sit under the UV rays for a day.