These beautiful ceramic diffusers help diffuse essential oils and are also a night light. Half fill the ceramic bowl with water and add 4 to 8 drops of essential oil or your favorite blend of essential oils. Plug in the Night-Light and turn on the switch. The heat from the bulb gently warms the water and disperses the aroma-therapy oils into the room. The plug can be rotated to accommodate various types of standard electrical outlets. (3 - Different Styles to chose from; Borage, Chamomile and Lavender.