A magnetic one uses metal plates that vibrate and they will make even more humming. Unlike fluorescent and incandescent light bulbs, there are no firing arcs or filaments in LED light bulbs. With that said, LED lights can make a buzzing sound because of electromagnetic interference. It can also be because of improper dimming. You always want to make sure that your dimmer is compatible with LEDs.
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Why Do Lights Buzz? Previous Next. View Larger Image. Incandescent Light Bulbs Generally, incandescent light bulbs tend to be fairly quiet. Fluorescent Light Bulbs There are two main problems associated with fluorescent light bulbs — buzzing and flickering. If the first, it will need to be clicked back into place to start working properly again.
Otherwise, you need to have it replaced. You can take it to a hardware store and get the exact match in amps. Humming occurs when the prongs of the bulb get dirty or misaligned. To fix this, you will need to remove the bulb and clean the prongs. Otherwise, you will need to remove the end casings and the starter and replace it or replace the ballast. Working with wires and electricity can be dangerous if not done properly. The photons in the UV light, however, in turn excite the electrons in the phosphor that is coating the bulb, similarly causing them to move away from their nuclei to a higher state; the phosphor electrons then quickly return to their original state, at which point they also release energy in the form of photons, but this time mostly in the human visible spectrum, creating the bulk of the visible light that makes these bulbs useful in office buildings the world over.
Now to the buzzing- Absent preventative measures, the current in the fluorescent tube would rise to dangerous levels owing to the fact that the electrical resistance of the ionized gas in the tube drops progressively as it heats up. So without something put in place to stop the current rising too much, this would be a cascading problem. Eventually, it could well flip your circuit breaker or the bulb could explode. Whatever the case, your lights would quickly stop working.
To manage that, fluorescent bulb fixtures are equipped with a ballast of some sort. This ballast classically comes in the form of an iron core wrapped in copper wire. Important to the discussion of buzzing is that the electricity energizes the ballast into producing a magnetic field. This is, in fact, how this type of ballast works in the first place- as more current is passed through, the magnetic field gets bigger, opposing the change in the current flow and thus slowing its growth enough for the alternating current AC to switch directions, with it dropping to zero and going back up in the opposite direction in the process.
Standard alternating current rates are usually 60 Hz a. For those who hate the buzzing or perhaps have issues with migraine headaches being induced by the fluorescent bulbs and their flickering light , electronic ballast as opposed to the old school magnetic ones are available and are even quite common today, such as generally found in Compact Fluorescent bulbs CFLs. These ballasts typically operate at a drastically higher rate than Hz or Hz, usually in excess of 20, Hz.
It should be noted, though, that if you switch to one of these electronic ballasts in your older fluorescent light fixture something that is surprisingly cheap to do , you do need to swap out your fluorescent bulbs to a variety that is rated to work with your new ballast. Those words should have been qualified by the addition of a phrase — e.
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