Our office was recently converted to 100% LED lighting. These are purpose-built fixtures, not fluorescent retrofit lamps.
Generally the way to go for performance and longevity. However, with the low cost of LED tubes and the ubiquity of the T12/T8 fixtures across commercial and industrial spaces, I'm not sure if it's the way to go for optimal ROI.
Name-brand ballasts on all of the fixtures.
This might be a quibble, but in my experience,
ballast generally means a device that operates an arc lamp such as a fluorescent tube, metal halide, sodium vapor, mercury vapor lamp, etc that requires a high-voltage DC pulse to start the arc then a lower operating voltage once the arc is established. These are generally standardized by lamp type and largely interchangeable.
LED fixtures have
drivers in my experience which tend to be far more tightly integrated into the fixture, and since the manufacturers have little incentive to commoditize their business through standard interchangeable components
(i.e. the Zhaga consortium that's seemingly failed to launch) cutting into their margins selling whole fixtures or proprietary spares.
So I'm confused by "name-brand ballasts" in purpose-built LED fixtures.