How do they work?
Water in the top chamber drips onto carbide fuel in the lower chamber which produces acetylene gas. A small amount of pressure builds up to push gas through the orifice creating light. Brightness is controlled by a valve that regulates how fast the water drips from upper to lower chamber.
Small Table Lamp - 10-3/4"H x 2-3/16"OD, 3/4 lb, burns 2-3 hours on one chamber of fuel.
Large Table Lamp - 16 5/8"Hx3 1/8"OD, 1 3/4 lb, burns 6-7 hours on one chamber of fuel.