: Say goodbye to that annoying high-pitched hum; electronic versions run almost silently.
: They operate at high frequencies (tens of thousands of pulses per second), which eliminates the visible flicker that causes eye strain. buy electronic ballast online
Always check the physical dimensions before you hit "buy." Some newer ballasts are slimmer and may require different mounting holes than your old heavy one. : Say goodbye to that annoying high-pitched hum;