Thank you Fuji for clearing it up.
What is a bit illogical and might be confusing is that in most countries flying IFR (and filing an IFR flightplan), regardless of weather conditions, needs an instrument rating. It is a bit strange to allow a pilot with very little intsrument experience to fly in conditions where they are expected to navigate solely by instruments. The fact that it might be CAVOK and fully VMC out there at night is purely incidental - if you're not allowed to have any visual references, then what's the difference between doing it in IMC?