On 26 Oct 2018 Sri Lanka issued a set of four very nice stamps featuring lighthouses of Sri Lanka. The stamps are available individually or as mini sheets.
Oluvil L/H | 26 Oct 2018Oluvil Lighthouse is located on the southeast coast of Sri Lanka near the fishing port of the same name.
Barberyn L/H | 26 Oct 2018Barberyn Lighthouse is also known as Beruwala L/H and is located on a small island on the southwest coast of Sri Lanka.
Pt. Pedro L/H | 26 Oct 2018Point Pedro Lighthouse is located on the north end of Sri Lanka at the southeast entrance to Palk Strait between India and Sri Lanka.
Galbokka Pt. L/H | 26 Oct 2018Galbokka Point Lighthouse is located south of Colombo harbor on the point for which it is named.
Oluvil L/H | 26 Oct 2018Galbokka Pt. L/H | 26 Oct 2018
More lighthouse stamps from Sri Lanka can be seen here