Fragrance lamps are an incredibly powerful way to fragrance your home and kill airborne bacteria, and consequently do not need to be used for extended periods of time.
For the optimum balance of room fragrancing with fragrance usage, we recommend to burn your lamp for around 20-25 minutes per time (an average sized room is about 20sqm, so this equates to about 1 minute per m3).
You will find that the fragrance in fact lingers in the air for several hours afterwards. Burning the lamp continuously for long periods of time will use your fragrance much faster.
More information on how to use Ashleigh & Burwood fragrance lamps can be found here