Wikipedia has great information on lanterns, here is some of it:
"The simplest technology used is the candle lantern. Candles give only a faint light, and must be protected from wind to prevent flickering or complete extinguishment. A typical candle lantern is a metal box or cylinder with glass or mica side panels and an opening or ventilated cover on the top. A primitive form of candle lantern, made from white horn and wood and called a lanthorn, was first made in the time of the English king Alfred the Great "
This cache is placed along a nice walk or bike path in Airdrie. It should be a quick find, enjoy the journey!