I pulled mine off the shelf to verify the scale, and compared it to my HO-scale firefighter figure from Revell's Firefighter model, which is definitely HO scale. Based on the comparison, I'd say the lighthouse is closer to N scale. The rail fences come up to my HO-scale figure's knee, and the roof of the little attached structure (living quarters?) only comes up to the figure's chest. So, I'm guessing at about 1/2 of HO scale, or about 1/160. I'm new on the forum, but if you contact me, I'll be happy to send you digital comparison pix.
ERic