Aroma lamp

[2] One of the disadvantages of this tool is that the light elements of the essential oils will be circulated around the ceiling first and will only come down at the end of the process.

A heat diffuser contains a small candle under a bowl to vaporize a mixture of water and oil.

This device is very cheap and doesn't need a special maintenance, however, the heat can change the chemical structure of the oils.

[3][4] Certain plug-in nightlight units made by companies such as Air Wick are used in combination with glass bulbs of scented oil, filling a room with fragrance and light.

The benefit of using this device is a strong concentration of the essential oil.