Dave - My biochemistry text says that bilirubin is a compound formed during
the breakdown of heme groups when your body degrades time-expired red blood
cells. Too much of it shows up as jaundice.
When infants have jaundice, they are treated by bathing them in light from
a fluorescent lamp. This photochemically converts bilirubin to more soluble
compounds that the infant can degrade and excrete. I would guess that this
is the type of lamp you have. If it can cause photo-reactions in a baby's
skin, I guess it should do it for printing too - though I would hope for
the baby's sake that the UV isn't very powerful or very short wave.