This evening the Northern lights over Selfoss were so strong and bright that the lights from the town did not affect them. A group of people had gathered, many of them tourist, and the atmosphere was filled with excitement. Every time the lights danced across the sky you could hear people applause, and I did too.
Info on Northern Lights on Wikipedia: https://en.wikipedia.org/wiki/Aurora
In the last few nights Northern Lights have adorned the night sky over Iceland. From around August 20 the nights become dim enough for the Northern Lights to become visible, but in summer it is too bright. Last night, around midnight, the Northern Lights could be seen, here in the sky above the church at Úlfljótsvatn (South Iceland, near Þingvallavatn). They were bright enough to be seen despite the bright moonlight.