Long burning tealight candles are perfect for those events that last a little too long for a standard tealight candle.  Long burning tealight candles will burn clean for 7 hours or more.  They are white unscented and come in disposable aluminum cups.  The disadvantage is that long burning tealight candles do not fit in most standard glass tealight candle holders.  The dimensions of long burning tealight candles are usually a bit larger than a standard tealight candle.