Light that is not reaching your plants is being wasted. Reflect that wasted light back on to your plants to achieve the best results possible for your indoor garden. Mylar Reflective Film is often used to line the walls, floors and ceilings of your grow-room to increase reflectivity up to 98%. Black and white plastic, or panda film as it is often called, is also used as a reflective covering for walls and floors, as it can reflect up to 90% of wasted light. It also makes a great light-proof barrier for partitions and doorways, waterproof flooring, or covers for hydroponic reservoirs and growing containers.