Our selections of eight-inch air cooled reflectors or hoods are sized to match up with 8-inch ductwork and 8-inch inline duct fans, providing cooling to your lamp as well as keeping excess heat from your grow area. These air-cooled reflectors isolate the lamp with a glass cover or enclosure to keep the hot air created by the lamp away from your plants by allowing cool air to pass across the lamp. Our larger 8-inch reflectors allow more air flow and can support more lights than a 6-inch reflector.