VIVOSUN digital ballast will save you more power because of their soft-start feature. Your bulbs will potentially last longer before they will need replacement. Most of them also won’t try to immediately re-fire a lamp if it goes out (Power outage or any other reason) and will wait some time. Then re-try. A standard ballast will continuously try to light the bulb up. They also don’t get as hot as a regular one.
Cooling System:
Protection System: