There are variable types of these diffusers in the market today. The first is candles, while being a popular method it is not plausible for all situations as it releases smoke into the air along with the scent of the candle.While having the ability to last the longest of all the diffuser products, it is not as effective in covering larger areas and therefore requires more sticks.For more information please visit our website-http://fragrances101.net/aromatherapy-diffuser-with-timer
