Halides & Heat

[mike31154]

Other than the warming effect on your tank water, is there any benefit to cooling MH lamps? Do they run better/longer when actively cooled like T5 HO? I recently installed a number of small fans to cool the ends of my T5 HO lamps since this is reported to make them last much longer and run more efficiently. Just wondering if the same is true for a typical 250 watt SE MH lamp, or if it's better just to let 'em run as hot as they want, provided they don't heat up your water to the point of requiring a chiller.