Anybody using 250w HQI ballasts with SINGLE ended bulbs?

[Chin_Lee]

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.