As the capital of Nunavut, Iqaluit is one of the best places for visitors to base themselves when exploring the remote northern territories of Canada. It also happens to be an excellent viewing location for the northern lights; they're very common between the months of October and April, but visitors will have the most opportunities to see them in December, when some days have as few as 4 hours of daylight.
There isn't as much tourist infrastructure here as there is in many other parts of the country, but there's also very little light pollution and plenty of remote viewing spots. Map