JakeH;4455660; said:Technically its a power supply, not a ballast, but your concept is correct. The power supply is usually the weak link in any LED fixture.
Actually most of the better commercial LED fixtures employ Constant Current Drivers to power the LEDs. LED's rely on constant current not voltage to operate reliably. I do agree, from what I've seen, that the drivers and/or power supplies do seem to be the weak link. I've personally performed "electronic autopsies" on a few different brands of LED fixtures, that were made in CHINA, and found truly sub-par quality electronics inside.

I prefer to build my own drivers from scratch and mate them with robust power supplies for economy/ longevity.