So I have shown a few photos and videos showing the light levels we get in the summer. Someone just shared this with me. It is a time lapse of over 2000 photos taken at Muckle Flugga at the far north of Unst.
Muckle Flugga was the most Northery manned lighthouse in the Uk. The outer stack is the most northerly part of the Uk, and is beyond the lighthouse.