Are you referring to the article about light pollution stopping 30% of the world from seeing the milky way?
The northern lights season starts around November and is visible until March or April and obviously the further away from cities you are, the clearer they are. Of course if it's cloudy then it's a no-show.
I know that the Hurtigruten cruise liner (
www.hurtigruten.no) had a special where they'd give you a free trip if you went during the Aurora period and DIDN'T see any northern lights on your cruise.
My personal recommendation is to find a place to visit like Lofoten which is known for Aurora activity but also has amazing landscapes. That way you focus on the landscapes and consider the Aurora as a bonus, rather than a given that will only let down your entire trip if you don't see it. Kinda like going to the Highveld in summer to experience proper thunder, even if you're at the right place and right time, it's not an absolute given.
I took miss Voicy to the Lofoten islands last weekend, which is just an hour or so South of us. Here's what some of it looks like:
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If you google image search for "Reine Lofoten" you'll get a good idea of what it looks like in summer, winter and with the aurora. Hope it helps.