Yup, nipples are supposed to be up on the bulbs. Also I hear fans direclty blowing on MH bulbs cool them down below thier designed operating temperature which, in turn, brings the bulb kelvin down.
H37 ballast are the optimum ballasts for Iwasaki. They are mercury vapor, suposidly they run the Iwasaki brighter, whiter and more intense. It's what they are designed to run on.
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