Liquid wax candle cartridges are clean-burning and consistent. They are convenient when table/lighting space is at a premium. They are mess-free and easy to use, never leaving soot or wax behind. They burn more efficiently than candles. Lamp/Candelabra Type: Lamp; Approximate Burn Time: 42 Hours; Size: 2 7/16". ~ Includes 36 disposable fuel cells.FHCF525. F525. FANCY HEAT FANCY HEAT Liquid Wax Fuel Cell Candle, Clear, 42 Hour, 2 7/16in, Clear.