For warm weather countries paraffin wax with melting point 65-66 C should be used to get a better quality candles and for cold weather countries melting point 58- C is ok .

good candle is defined by : good lighting , good burning , no smell , stable flame , long lasting , no smoke

all these specifications are related to paraffin quality : oil content , color , odor , melting point

better paraffin wax means better candle.

Paraffin wax,  colourless or white, somewhat translucent, hard wax consisting of a mixture of solid straight-chain hydrocarbons ranging in melting point from about 48° to 66° C (120° to 150° F).  

Paraffin wax is obtained from petroleum by dewaxing light lubricating oil stocks. It is used in candles, wax paper, polishes, cosmetics, and electrical insulators.