Candle
A candle was a stick of wax with a wick that was lit. The flame would gradually use up the wax as it burned, shortening the candle.
They were invented by the Roman Empire. (COMIC: Quite Interesting)
While in the Land of Fiction, Zoe recognised the candles that were lighting the inside a house. (TV: The Mind Robber) On Ta, Jamie teased Zoe when she did not recognise or understand the function of candles, a technology that she had never encountered. (TV: The Space Pirates)
On the planet they developed, the Tesh built a shrine to Xoanon complete with many candles. (TV: The Face of Evil)
Mandrel marked a level on a candle he owned and told the Fourth Doctor he must return from the Consum Bank before it burned that low or he would kill Leela. (TV: The Sun Makers)
Due to the plant's sensitivity, West Yorkshire rhubarb had to have a carefully controlled light source. For this reason, Martin Chisom used candles in his rhubarb forcing shed. (AUDIO: Lost in the Wakefield Triangle)
The Eighth Doctor's TARDIS was filled with candles. (TV: Doctor Who)
On Gallifrey during the First Segment of the Last Great Time War, the War Doctor gave Rojan a candle to light the cavern in which they took shelter from the Daleks. (PROSE: The Stranger)
Madeline Vaughan lit candles around Sebastian Vaughan's corpse due to his lifelong fear of the dark. (AUDIO: The Vigil)
St John Colchester was once sent a scented candle by a cousin of Colin Colchester-Price's. (AUDIO: Night Watch)
The cathedral gift shop stocked candles. (PROSE: Iris Wildthyme and the Unholy Ghost)
In the story Godfather Death, Death marked each life by a candle. When the titular godchild defied Death, Death marked a short candle as the child's, killing them. (PROSE: The Knight, The Fool and The Dead)