Why do Fluorescent Lights Hum?

Answer

Fluorescent lights hum because fluorescent lights contain gas and mercury. When the gas inside the tube is ionized, the current rises very quickly, but a device called a ballast is used here to limit the current through the tube, thus causing the buzzing noise.
Q&A Related to "Why do Fluorescent Lights Hum?"
If you have eliminated vibration noise from loose fittings or metal parts of the fluorescent light fixture, the cause of humming may be ballast harmonics. Two types of ballasts exist
http://www.ehow.com/how-does_4895072_why-do-fluore...
1 Buy a new electronic ballast suitable for the wattage of your lamp. Ad 2 Unplug the unit. If it is permanently connected to power, shut off the breaker. Do not disassemble the unit
http://www.wikihow.com/Fix-Fluorescent-Light-Hummi...
The sound to which you refer is typically produced in the ballast. A noisy ballast is often an indicator that ballast is not doing well. The ballast is a special purpose transformer
http://wiki.answers.com/Q/What_makes_a_fluorescent...
The tube seems to constantly get a little bit of current to charge up, however not enough to power the light. Once the cap charges enough to trigger the electronics, the tube will
http://www.quora.com/Lighting/Why-do-fluorescent-l...
1 Additional Answer
Ask.com Answer for: why do fluorescent lights hum
Why Do Fluorescent Lights Hum?
If you have eliminated vibration noise from loose fittings or metal parts of the fluorescent light fixture, the cause of humming may be ballast harmonics. Two types of ballasts exist with three sound ratings, but all ballasts hum to a degree. Commercial... More »
Difficulty: Easy
Source: www.ehow.com
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