I'm reposting this as a new thread as it was a whole different topic from the cold light question.

Please forgive my ignorance, but what is the relative expected lifetime of black and white RC, FB, colour papers (there are diferent types) and digital prints (again there are different types)?
I have B+W prints made on RC paper back when I was at university (almost 30 years ago) that still look good, and have spent much of their lifetime displayed on walls, though not in direct sunlight.