Linked from
The 8 pages that link to Candle, each with the reason it gives.
Stearic acidRelated: Stearic acid can harden candle wax and raise its melting temperature.
Oil lampCompared with: Unlike an oil lamp, a candle stores fuel in solid form around its wick.
Electric lightCompared with: Its flame provides illumination without electrical power.
Sky lanternRelated: A small flame provides the heat that makes the lantern buoyant.