nice idea but i doubt my light would heat that up much plus not much room in the room in which i'm growing but i could place it in the shed near a window that would shine light on it but the water might freeze so i don't think it would work so well. i believe i have the heating under control now but i'm wondering about AIR now i need to know if i can use the convection of hot air exiting the top and cold air incoming on the bottom for enough co2 for plants to grow that's all i'm not looking to vent heat just looking to vent the oxygen produced from the plants and introducing new co2 from outside the room without a fan