[RFI] Low Noise LED Recessed Lights - Again

[Jim Brown]

On 9/11/2024 12:24 PM, Thomas Hoyer via RFI wrote:
>   Any suggestions from the group?

Yes, several. First, limit your choices to line-voltage fixtures that 
accept an Edison (the standard) bulb. Then choose bulbs from major mfrs 
whose bulbs are less noisy, and the specific bulbs from those mfrs that 
have been tested and found to be quiet. Retired EMI engineer has set up 
a serious EMI lab at home, and has tested a bunch of bulbs. He has 
offered to test others if I sent them to him. The brands I buy are 
Phillips and FEIT. Some of these are quieter than others.

If your architecture permits, consider track lighting, with the same 
requirement for line voltage track and bulbs.

About ten years ago, a retailer started exhibiting at west coast 
hamfests with long strips of LEDs on a spool, designed to work from 
12-24VDC from a single end feed. They also sell thin metal fixtures with 
the same electrical configuration, designed to be mounted to surfaces, 
and with connectors allowing them to be ganged together if desired.

https://www.wiredco.com/LED-Lighting-Low-Voltage-s/1874.htm

I do NOT recommend their power supplies. :) Rather, buy our build one or 
more linear PSUs that are known to be quiet. BTW -- many (most?) of the 
regulated wall wart/line lumps I've tested recently have been noisy, 
perhaps using PWM for regulation.

73, Jim K9YC