Check the listing for details. Lehman's Bulge Comet Oil Lamp Chimney, 2-1/6 in Base x 6 1/2 in High. Color: Clear, Condition: New. Listed at 10.98 USD. Oil lamp chimneys are used to cover and protect the flame of an oil lamp. The chimney serves several purposes: Protection: The chimney shields the flame from drafts and prevents it from being extinguished easily. This is especially important in outdoor settings or drafty indoor environments. Safety: By containing the flame within the glass chimney, the risk of fire hazards is reduced. It prevents sparks or embers from escaping and causing accidents. Enhanced Light: The shape and design of the chimney can help to concentrate and direct the light produced by the oil lamp, providing better illumination. Aesthetic Appeal: Chimneys often come in decorative designs, adding to the visual appeal of the oil lamp and enhancing the ambiance of the space in which it is used.