The Lange Jaap is the highest lighthouse in Europe made out of cast iron plates. It's built from plates which have been mounted in a hexadecagon shape.
The lighthouse, which is listed as national monument since 1988, is a popular motif for tourists.
You can see the light of the fire in up to 54km distance.
Your task:
Find the missing numbers ABCD in this picture:
Additionally, find the missing number EFG in this picture:
Use ABCDEFG as password when logging.
Also listed on opencaching.de: OC12515.