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#1
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light humming
Hello, I have a flouresent light fixture above my sink.
When it is on it humms loudly. I have replaced the tube and it has no starter. What is causing the hum? PS it is an old fixture |
#2
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light humming
The ballast transformer
"mo" wrote in message news:WDNIf.16264$7C3.9981@trnddc08... Hello, I have a flouresent light fixture above my sink. When it is on it humms loudly. I have replaced the tube and it has no starter. What is causing the hum? PS it is an old fixture |
#3
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light humming
"Magnetic ballasts modulate electrical current at a relatively low
cycle rate, which can cause a noticeable flicker. Magnetic ballasts may also vibrate at a low frequency. This is the source of the audible humming sound people associate with fluorescent lamps. Modern ballast designs use advanced electronics to more precisely regulate the current flowing through the electrical circuit. Since they use a higher cycle rate, you don't generally notice a flicker or humming noise coming from an electronic ballast. Different lamps require specialized ballasts designed to maintain the specific voltage and current levels needed for varying tube designs." more about flourescent lights at: http://home.howstuffworks.com/fluore....htm/printable |
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