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#1
07-10-2007, 07:28 AM
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Yes its true that a 400W HQI ballast is a Son AGRO ballast more commonly used to fire up HPS bulbs in the hydroponic industry. The aquarium industry has adopted these Son Agro ballasts as the equivalent of a 400W HQI ballast. As much of a misnomer as it is, since we are discussing it on a Reefing board, I feel it is appropriate to refer to it as a 400W HQI ballast regardless if one actually exists.
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____________ If people don't die, it wouldn't make living important. And why do we fall? So we can learn to pick ourselves up. 
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#2
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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