I would say you're fine in terms of lighting, ATI blue plus produce the highest PAR of any T-5 bulb. I would wonder about the ph being down to 7.8. It's normal for the ph to vary a few points between night and day, but 7.8 is lower than I would want it to be. I would push for 8.3 in the middle of the day after the lights have been on for hours and preferably no lower than 8 in the morning before the lights come on. Opening a window in the room can raise the ph by reducing the CO2 in the air.