In 1985 the Faroe Islands issued a set of 4
stamps, one with a map showing all(?) the lighthouses, and the other
three showing individual lighthouses. The map of the Faroe Islands
shows the locations of 22 lighthouses. According to the Danish
lighthouse service the Danish Administration of Navigation and
Hydrography operates 27 lighthouses on the Faroe Islands. The web page
“Lighthouses of the Faroes”
http://www.unc.edu/~rowlett/lighthouse/fro.htm describes 18.