Northern Light Skulsfjord Tromsø by Ronny Mikkelsen / lovetotravel-sh.
Aurora Borealis Reflections - The Northern Lights are breathtaking
5 More Things No One Ever Tells You About the Northern Lights - Luxe Adventure Traveler. This has great information about the Northern Lights.
"Multicolor Aurora Borealis -Beautiful" northern lights also has the rainbow flavor.