There is a wonderful post about the lighthouse, it's history and people in Eva Lazarus blog. That's how she describe it:
"Green Island, likely named because it’s not, is a rocky wasteland 25 miles north of Prince Rupert, eight miles from the Alaska border and the most northern lighthouse in the province. No trees grow on this lump of ice in winter, where 50 knot winds constitute a light breeze and last for weeks."
The painting is made on stretched canvas, sized 8x24 inches, covered with protective UV acrylic varnish.