Citrus and floral fragrances are good for open, airy and large rooms, and typically take less reeds to create the desired effect; so don’t be afraid to remove a reed or two if you find that to be the case. Wood notes and resins on the other hand are amazing, but often require more than one candle to be burning at a time or more reeds in the diffusers in order to create the ambiance that you are looking for.