Scented reed diffuser bottles comes with 8 reeds. Start our with 6 to see if that is strong enough and add up to 8 reeds at a time for maximum fragrance. These are meant for small spaces like the bedroom, office or den. Sit these in a nice place out of reach of children and pets all day without worrying bout the flame of your candle. Get continuous fragrance all day long. These should last longer than your candles.