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Originally Posted by ree-fready
J&L is selling 400 hqi pfo ballasts for $ 389 for a double
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yup, in the 400's all they are is a Son Agro ballast, which is a High pressure sodium (finaly remembered it isn't a mercury vapour ballast
) ballast that is actualy a 430 watt ballast.
so what you see here is a 430 watt ballast that is designed for another type of HID lighting that happens to make a 400 watt bulb burn brighter and whiter due to the hoter running temp, with a reasonable impact on bulb life. in the 400 watt HQI you are overdriving the bulb, the 250 which is ture HQI you are not.
Steve
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