Gras lamps are a type of light that uses a flame to heat air. They are typically used for heating the room in cold weather or for decoration during the Christmas season.

Gras lamps have been used in Europe since the 19th century. The first gras lamp was patented in 1878 by Louis-René Vauquelin, who was a French chemist and physicist.

The most common type of gras lamp is made out of glass and has two wicks, one on either side of the flame. The wicks are connected to a small chimney that allows air to flow through it easily, which then heats up and warms up the room.