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Thread: Noisy Incandescent Lighbulbs
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February 7, 2020, 10:39 PM #1
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Noisy Incandescent Lighbulbs
I have been replacing incandescent light bulbs with LED bulbs in the house. It has been on a need basis instead of deliberate. While in the process, I noticed that several (not all) incandescent bulbs had a very faint high frequency noise. I switched those bulbs to LEDs and the noise went away.
I have a lot of incandescent lightbulbs in my music room so I am now going to check if I need to replace those bulbs now rather than later.
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February 8, 2020, 05:49 PM #2
Re: Noisy Incandescent Lighbulbs
I thought / read that LED’s bulbs are inherently very noisy?
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February 8, 2020, 07:03 PM #3
Re: Noisy Incandescent Lighbulbs
That is what I had also heard. I would have assumed that incandescent bulbs would actually put more less noise into the environment than LED.
Note: I have replaced the can lights in my 2-channel room with Phillips HUE LED's and have not notice any impact on SQ. I just like the ability to adjust alll four lights individually via blue tooth.Jim
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February 8, 2020, 07:29 PM #4
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Re: Noisy Incandescent Lighbulbs
It is a high pitch sound. You can hear it when you get close to them. They all have dimmer switches which may be a factor, but with LEDs the noise is gone.
I have 10 more bulbs (cans) in the room that I need to check.
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February 8, 2020, 07:55 PM #5
Re: Noisy Incandescent Lighbulbs
The dimmers are where the noise is coming from. Incandescent bulbs (without dimmers) oscillate at 60 hz. You are fortunate the leds are quiet. Noise is their only drawback.
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February 9, 2020, 02:22 AM #6
Re: Noisy Incandescent Lighbulbs
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February 9, 2020, 03:14 AM #7
Re: Noisy Incandescent Lighbulbs
The only fluorescent I have is under the kitchen cabinets, T5 bulbs on Control 4 switches - all else has been switched to LED, either bulb or fixture.
I can turn them on and off from my phone/iPad and you can hear a slight hum in the server only.
Think I’ll have that solved in the upcoming weeks.
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February 9, 2020, 08:25 AM #8
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Re: Noisy Incandescent Lighbulbs
I attended an audio show at a local hotel about 8 year ago and one of the exhibitors told me that they experienced a sudden improvement in sound quality when the lights were turned off. They went to a local store, replaced the CFL bulbs in the room with incandescent bulbs and had better sound. More than one other exhibitor at the show had the same experience.
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February 9, 2020, 09:26 AM #9
Re: Noisy Incandescent Lighbulbs
Jim
D'Agostino Momentum M-400's MxV’s & HD Pre-amp
Wilson Alexandria X2 Series 2 speakers
Digital: dCS Vivaldi APEX DAC, Clock & Upsampler
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February 9, 2020, 10:37 AM #10
Re: Noisy Incandescent Lighbulbs
A few years ago I used an Entech noise analyzer to check the effect of different lights on electrical noise. The CFL and LED bulbs were definitely the worst. I don’t recall which was worse between the two. Incandescents faired better if memory serves. I wonder if this isn’t another reason that our systems tend to sound better in the evening - fewer lights on.
Morgan
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February 9, 2020, 11:17 AM #11
Re: Noisy Incandescent Lighbulbs
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February 9, 2020, 03:20 PM #12
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Re: Noisy Incandescent Lighbulbs
Yes. In my experience fluorescent bulbs are the worst.
I also agree that my room is quieter when the lights are off. In my case, that can be a result of having multiple dimmers on multiple light sources.
The dimmer switch itself or the lightbulb can both be noisy. I recently replaced one of the dimmers (a 22 year old dimmer) with a new one. The noise at the light switch went away. Still need to check the lightbulbs.
By the same token, a single incandescent light connected to a dimmer switch has no noise at either place so I am leaving that one alone.
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February 9, 2020, 05:54 PM #13
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February 9, 2020, 06:24 PM #14
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February 9, 2020, 06:31 PM #15
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February 9, 2020, 06:39 PM #16
Re: Noisy Incandescent Lighbulbs
All fluorescent lamps use a plasma that illuminates a phosphorescent coating on the inside of the lamp. This plasma is a source of broadband radiated EMI.
CFL and standard fluorescent lamps using electronic ballasts have switching power supplies which conduct interference into the mains.
LED lamps have switching power supplies which conduct interference into the mains.
Incandescent dimmers use duty cycle modulation which creates high frequency noise.
I have all the dimmers in the house on one phase (leg) and the audio equipment on the opposite phase (leg) which helps mitigate interference.
All these devices are not built the same so I use an EMI meter to find and return led lamps that are noisy.
I have found Lutron dimmers to be the quietest.Tom
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February 9, 2020, 09:35 PM #17
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February 10, 2020, 12:01 PM #18
Re: Noisy Incandescent Lighbulbs
"No summit worth climbing is easily attained."
--------------------------------------------
Source: MSB Select II DAC with Two Mono Powerbases and Femto 33 Clock; Renderer V2 Digital Input Module and Roon Nucleus Plus; MSB UMT V Signature Transport
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February 10, 2020, 12:54 PM #19
Re: Noisy Incandescent Lighbulbs
There are a few types of noise in lights
1- dimmer it makes two kinds
RFI and physical noise to the bulb and it’s self.
2- bulbs old Incandescent bulbs are bad at acoustical noise the filament vibrates. A heavy duty bulb makes less noise as it has more supports inside
led are both acoustical and RFI as well.
most systems have no filter for the RFI much less what’s going onto the power lines
a balanced iso fixes this.
there are specs on all ul listed products to help you but in the end it’s trial and error
to me fluorescent is best. No acoustical or RFI I ever head.
dimmer emit less acoustic and rfi.
of you go led you Need a 4 wire system
this means 2 wires 120 volt
2 low voltage 0-10 volt to dim the leds.
This is best it’s being used in my ausio roomTUBEZATOR
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AudioShark forum is a leading forum site for High End Audio Discussion, Stereo System Discussion, Home Theater System Discussion, Best Home Stereo System Discussion, Home Theater Installation Discussion etc.
The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.
At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.
We are as crazy about this hobby as you are! So come on in and join us! Audioshark.org the Friendliest Audio Forum!
Industry Participation Disclosure : The owner and administrator of Audioshark is the owner of Suncoast Audio LLC in Sarasota Florida. Suncoast Audio has a full brick and mortar presence in Sarasota with several great show rooms with many world class brands. More information can be found at http://www.suncoastaudio.com
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