An integral electronic ballast with a power factor of .9 or better (1 being perfect) with the ability to operate on 277–480vac and that is able to maintain current regulation +/- 2% with input fluctuation of 25% per second and an ability to be dimmed via maintaining constant voltage, consume less than 3% of total current usage for internal operation while carrying a true UL, ETL, CE/CSA registration, and finally can be easily networked via UTP with a minimum of 254 additional fixtures plus controller.
We get all of this from Hortilux Schrader or PL Lighting in Canada. We like the durability of their NXT2 1000W professional agriculture fixture with lifetime coated German optics and Philips electronic ballast, commonly referred to as the “driver.”