Why the melting point of candle wax cannot be too high?

Answer 1

Candles contain organic compounds with low melting points.

Answer 2

Candle wax needs to have a moderate melting point so that it can easily be ignited by the wick and produce a steady flame. If the melting point is too high, it would require more heat to melt the wax and sustain the flame, making the candle burn less efficiently and produce less light.