What happens when I’m invisible and something I’m wearing has Light cast on it?

The bard in my group cast the light spell on an amulet he was wearing. Then after triggering a trap, he cast invisibility on himself.

What happens in this situation? The amulet is now invisible but does it stop emitting light because of this? Or is the amulet invisible but the light it emits still visible?

Has anyone got a decent ruling on what should happen in this situation?