When using dual-cured resin cement, is it better to let it set by itself over time or to cure the resin cement with a curing light?

Use light activation whenever possible – dual-cured cements typically have increased strength properties and bond strength when light activated. Excess cement is easiest to remove after brief exposure to a curing light, but hard to clean up if you light cure too long. Cure for 2 to 4 seconds, clean up the gross excess and the contacts, and then post cure the restoration some more.