In reply to shaun walby:
As others have said, the nights are long, but it's not actually dark for much longer than in Scotland since the sun just hovers around the horizon most of the time. I was there last week in Jan this year...
http://www.zenadsl6044.zen.co.uk/Lofoten/index.html
... and was surprised how much you can get done.
Observations:
* It's quiet that time of year. A lot of places were closed.
* It was seriously cold (by my standards). I would not have wanted to be camping (car or tent).
* Make sure any car you do get has studded tires (probably the norm, but check). You're not getting far without them. Most roads were just compacted snow/ice. Deep fresh snowfall was cleared really fast (even on cyclepaths), but not the base layer. We saw more snowplows and buses than cars.
* The light is fantastic. If you have decent weather.
* There seemed to be auroras most nights. If it was clear.
* Lots of whales around (if that floats your boat), but they won't be there for long (herring moving on...). See them whilst you can.
* I really want to go back an explore the winter hills.