Light exposure can significantly affect the quality of your tea and reduce its shelf life. When tea is exposed to light, it undergoes a process called photo-oxidation, which leads to the breakdown of essential oils and flavor compounds. This results in a dull taste and aroma, rendering your tea less enjoyable. To prevent light exposure, ensure that you store your tea in opaque containers or tins that block out light. Additionally, keep your tea away from direct sunlight or any other sources of UV radiation. By taking these precautions, you can extend the shelf life of your tea and preserve its rich flavor and aroma for longer periods.