LED EMI

You need an EMI choke as close to the socket as possible. The wires supplying power to the lamp are acting as transmitting antennas and radiating RFI. This also could include the house wiring in the walls.

Our MultiColor models of our Z linear series grille lights/surface mounts are our newest and most improved low-profile warning lights featuring a variety of flash patterns that feature both MultiColor flash mode and single color A or B flash mode. The MultiColor functionality of this bar allows both left and right sides to flash different colors in the same module based on your order giving you true MultiColor flashing functionality while also giving you a variety of flash patterns in single color mode A or B so you can even switch between which color you need to use at that time, giving you the best of both worlds. With our multicolor models, having clear as your secondary color gives you an extra benefit of the steady burn override Super Take Down® effect. This means when you activate your steady burn override shortcut, your secondary color will go all steady. Therefore, if your secondary color is clear, you get an all-white steady burn illumination.

Noisefilter for LED lights

Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Does there exist any certified power efficient low EMI lighting? (e.g. more than just generic required regulatory labels on the boxes which may or may not indicate anything about what's actually in the box).

LEDlight RFIfilter

My guess is STP cable or equiv. In a heavier guage will be EMI quiet with 12V on any earth grounded DC should not interfere with DX from a PC PSU.

LED Grille Lights and Surface Mounts are a low-profile and versatile way to outfit your emergency vehicle lighting application. From the compact Z-series surface mounts to the rectangular Alpha Series Fire Truck and Ambulance Warning Lights – we carry a variety of shapes and sizes to give you the ultimate flexibility when outfitting your vehicle.

EMIlightning

LED Grille Lights and Surface Mounts are a low-profile and versatile way to outfit your emergency vehicle lighting application. From the compact Z-series surface mounts to the rectangular Alpha Series Fire Truck and Ambulance Warning Lights – we carry a variety of shapes and sizes to give you the ultimate flexibility when outfitting your vehicle.

At shortwave frequencies, the lamp itself is too small in relation to a wavelength to radiate very far, unless your shortwave receiving antenna is close to the lamps.

And if the black-brick should be poorly shielded (to block outside views of internal 200volt/100nanosecond edges), then that would need the faraday cage.

Almost every LED light I've tested (hold an AM or shortwave radio antenna nearby) emits RFI or EMI across a vast frequency range. The EM noise comes either from the base of the bulb, or from some box or wall-wart supplying a DC voltage to the LED fixture.

Bestemi filter for led lights

Is there any common solution to fixing or reducing this EMI? Other than throwing all these LEDs away and going back to hot incandescents? (which may or may not be legal in some settings.). Putting a opaque Faraday case around a light bulb makes them useless for lighting.

Slug each line with an RF choke, as close to the source as possible: outputs if a wall wart, inputs if it's in the base. (No good doing one big choke round the whole cable, as this will not address differential-mode RF)