Reflectors are used to hold indoor grow lights and spread the light across the plant's canopy in living soil grow rooms. You don't want all that light wasted away from the plant - direct it down right onto the canopy. Grow lamp reflectors can come ready to hang, or flat packed in the case of adjustawings. They have the options of silver aluminium, which is best for reflection, but more delicate, or powdered coated white has the advantage of being stronger and longer lasting.