Midnight Sun & Northern Lights in Scandinavia

According to my "Rough Guide to Scandinavia", the Midnight Sun is visible at the following times:

Location From To
Alta   May 16   July 26
Bodų   May 30   July 12
Hammerfest   May 13   July 29
Nordkapp   May 11   July 31
Tromsų   May 18   July 26

The whole sun here should be visible on the horizon.

If its the Northern Lights you're interested in, have a look here.