We stock a great range of air-cooled indoor hydroponic grow light reflectors. A reflector is an essential part of a grow light system to prevent light being wasted. They reflect light from the grow lamp back down onto the garden making the most of the light (and electricity). Air-cooled reflectors help to keep your grow-space cool by allowing the heat created by an HPS lamp to be removed via a duct fan. Air-cooled reflectors require a duct fan (sold separately) to be attached which must be running when the lamp is on.