Also D9 when you get a chance, why did you go with the Hortilux? I've seen they have the best PAR ratings but they're also priced four times as high as other HPS bulbs (e.g., Apollo Hort's bulbs ... see Amazon). Given that HPS bulbs usually lose reds after a year, seems like any slight loss in PAR wouldn't make up the difference...
i began using horti's years ago with my mag ballasts and they have performed well but i'm about to have to replace them all and will probably get something else.
i just bought sunmasters for my 600 watt fixtures.