A tealight (also tea-light, tea light, tea candle, or informally tea lite, t-lite or t-candle) is a candle in a thin metal or plastic cup so that the candle can liquefy completely while lit. They are typically small, circular, wider than their height and inexpensive. Tealights derive their name from their use in teapot warmers, but are also used as food warmers in general.
Tealights are a popular choice for votive candles. They are also suitable for accent lighting and for heating scented oil. Tealights may be set afloat on water for decorative effect. Because of their small size and low level of light, multiple tealights are often burned simultaneously. Longer-burning tealights may be called nightlights.