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#9
07-11-2007, 02:59 AM
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Agreed, the fabled 400 watt HQI ballast is actually as you state a Son Agro ballast and they have a wattage output to the bulb of 430 watts. They were the ballast used for the 400 watt Radium 20k bulbs which are actually rated as 360 watt bulbs. So the bulbs were overdriven by 70 watts which led to a short life span.
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-=Bryan=- 
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