The phrase "store below 25 degrees Celsius" typically means that the item should be stored at temperatures lower than 25 degrees Celsius. It does not imply a specific range within that limit. Therefore, it would be appropriate to interpret the instruction as storing the item at temperatures below 25 degrees Celsius, including temperatures within the range of 15-25 degrees Celsius. However, it's always best to consult specific instructions or guidelines provided with the item for precise temperature requirements.