The final portion of an IFR flight is the same as VFR at night (unless we're talking about CAT3 Autoland). Normally, you land at an airport at night and everything is well-lit there, including an approach lighting system. Usually not a problem for a VFR day pilot.
Off-airport landings are of course a different business, however they are usually prohibited anyway (only allowed for night training here). Some other european countries do not allow Night VFR at all.