The bowe l filled with citronella candles are very effective for small spaces. They are cute, come in a variety of colors and are perfect to keep away mosquitoes and all flying insects.
They will burn for approximately 20 hours by lighting the candle until a layer of liquid covers the entire candle (usually 3-4 hours). This allows the oil to heat and burn slow and clean. Do not light it for a short period of time to avoid creating a hole in the middle.