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![]() Yes it is a HPS ballast but it has been tested and PHO sells it as there 400 watt HQI ballast. so I don't think they would sell something that is going to distroy bulbs.
I have seen the difference personaly on a tank with 10000K ushio on a normal 400 watt ballast and the son agor ballast.. it is much brighter and much whiter.. it was a big difference going to the Son agro.. as for the radiums I have seen the difference there also.. a radium on a normal MH ballast is blue.. no other word.. just blue.. on the son agros it is a whiteish blue ![]() hope that is of some help.. Steve
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