J&L is selling 400 hqi pfo ballasts for $ 389 for a double

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 :mrgreen: ) 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

Well thats good to know for when I upgrade my ballasts. Thanks