1) Candle 2) Rush candle 3) Taper 4) Wax light 
A rushlight is a type of candle or miniature torch formed by soaking the dried pith of the rush plant in fat or grease. For several centuries rushlights were a common source of artificial light for poor people throughout the British Isles. They were extremely inexpensive to make. English essayist William Cobbett wrote, `This rushlight cost almost....
a type of candle dipped in grease
• (n.) A rush candle, or its light; hence, a small, feeble light.
Rush'light` noun A rush candle, or its light; hence, a small, feeble light. 
[n] - a tallow candle with a rush stem as the wick
rush candle noun a tallow candle with a rush stem as the wick