Best bet, IceHouse water coolers for the lights. Its the only thing that worked when I was battling heat issues in the mid 90's. I was running 2 400 watters with ducting similar to yours in a closet and the water chiller dropped the temps 10-15 degrees. Thats more of a temp drop then getting my enclosed hoods. You'll love em and really you can make them yourself with an ice box, a water pump, and acouple fittings and stuff.:thumbsup: