We've seen northern lights for four nights in a row. On the second night it was quite spectacular.
The lights move, shimmer and drop as you watch them. The look like a Ballerina's tutu shimmering and waving. There were also huge swirls in the sky, like stirring cream into coffee. At other times the sky would glow dully and then suddenly sparkle.
There was a bit of colour in it - green and pink - though nothing like it comes out in the photos. The photos also don't quite capture the beauty of how the lights move and develop. You can have a look at the photos here.