should I run my fans to keep lights cool?

[GrimReefer]

i think it would be more energy efficient to run a canopy fan when your halides are on, and use an external or more powerful canopy fan (or two?) when the tank hits your temp limit. that's how i've been using my RK2 and it's been working great. it's difficult to say what configuration would work best for you as every system is unique, and the RK2 allows so many possibilities.