Candle light dinner often looks like romantic moment for spouse who falling in love. But candle also have hidden dangerous because it also source of indoor air pollution. Researchers from South Carolina State University, United States of America, compared between petroleum candle substance and vegetable candle substance to knowing their emission. They burned some kind of candle inside a little box. After that, their analyzed air inside the box. The result is candle with paraffin substance – the easiest substance of candle that find in market – evidently produces dangerous smoke contained toluene and benzene. Researchers concluded that lightened candle now and again (not often) is not dangerous. But, if you often lightened candle in poor ventilation room can cause health disorder like allergy and throat inflamed.