A few lighthouses from the USSR era. These stamps were issued in 1983 and it seems all the lighthouses are from Estonia (I couldn't find Stisudden, though it's quite possible it a different name in Estonian)
The Kipu – or Kõpu – lighthouse is one of the oldest in the world and has been in continuous use since it was built in 1531
The Keri lighthouse was built in 1858 and stands 91 feet. The light is computer controlled, powered by solar cells and batteries, but from 1907 to 1912 it was the only lighthouse in the world to be powered by natural gas.
The Tallinn – or Tallinnamadal – shoal light is in the Gulf of Finland about 20 miles or 32 kms from the Tallinn shore. This was built in 1969 and took almost a decade to complete because storms damaged the base. It is now closed.
The Tahkuna is a cast iron lighthouse built in 1873. It was bought from the Paris World Exhibition in 1871 and is Estonia's tallest lighthouse at 42.7 metres above sea level.
for more lighthouses around the world, check out the links here