Wallflower Duo Plugs will reset to the bulb on the right side whenever they are unplugged or if the power goes out. If the bulb on the right side is low, this may cause the right bulb to be used faster.
Each fragrance is unique; some last a little longer and some are used up a little more quickly. While we try, it is difficult to engineer every formula to have the exact same usage rate, so some natural variability will occur.