Random thoughts on combustion.
Would expect alcohol to flame around 850. Would expect hydrocarbon wax around 1050 though core flame (oxygen rich zone) to be much hotter at >1250.
Carbon soot is the result of poor combustion at the tip of the wick. The wick also adds to the soot.
Try burning wax in an oxygen enriched environment. Almost as much fun as hydrogen/oxygen filled balloons.
Noodling around, it appears that type of wax/fuel and position in the flame impact temperature. Average temperature of ethanol flame given is around 1100 F. Average candle flame temperature given ranges from 850 F-1400 F, with average around - 1100 F