High quality black and white sheeting which is 80% – 85% reflective and provides 100% light proofing and black out. The white side is to face into your grow room to reflect the light onto your plants whilst the black side is to prevent the possibility of adverse effects from outside light. Ideal for covering windows to prevent outside light leakage and also for splitting grow rooms. Other uses include covering tanks, hydroponic systems and pots. Can also be used for ground cover.