These models represent typical lanterns fit to sailing ships of the 18th and 19th Centuries.
Plastic is transparent. The cylindical part of each lantern is hollow. The cap is solid.
Dimensions of a single lantern:
height = 10.4 mm
outer diameter = 5.0 mm
open bottom diameter = 3.6 mm
Features of this model match scaled dimensions and shapes published in "Anatomy of the Ship: The Frigate Diana" by David White and "Anatomy of the Ship: The 74-gun Ship Bellona" by Brian Lavery.