I've seen quite a few brands, make sure you get the electronic ballast, I've seen some cheapy ones that were not. We have some local brands that run fairly cheap, about 199$ complete for 2x54w 299$ fior 4 x 54 retail, you proably can find them cheaper, I still use PC lights or HQI but will upgrade later to HQI and T5.

Regards,
Tom Barr