Is it normal for LED lights to make noise?
LEDs lack a filament or firing arc so there are no “moving parts” to cause humming. Unfortunately, LEDs still suffer from electromagnetic (EM) hum caused by incorrect dimming or EM interference by other devices. But, if your lights hum when dimmed or installed into sockets connected to a dimmer, it's simple to fix.
Do LED bulbs pop?
It is highly unlikely that LED bulbs will explode. However, in rare cases, thermal and electrical stress can be caused by voltage surges, faulty capacitors, and poor heat management, which leads to LEDs exploding.
Can LED recessed lights cause fire?
Lights generate a lot of heat when they are in use. This heat can be a safety hazard in certain situations where recessed lighting is used. This is important as non-IC rated recessed lighting in contact with insulation creates a fire hazard.
Answer: While LEDs run much cooler than incandescents, their electronic components and external heat sinks do get quite hot; you would still need to keep the insulation away from your fixtures. You could hire an electrician to replace each fixture with a sealed one rated for insulation contact (IC).
A fixture can overheat if its light bulb has a wattage that's too high. Take the bulb out of an overheating light and read the label inside the housing that tells the maximum wattage of bulb that fixture can handle.
If your lamp has a confined space, or if it is a downlight with no ventilation, it can capture heat (heat rises) and the heatsink will not cool properly. Better LEDs have thermal detection and will shut off to spare the LED emitter from overheat.
Electricity can travel like lightning through the air from exposed wire to another metal surface, and it produces the same crackling sound. Arcing electricity also is as hot as lightning and easily can start a fire.
The switches could be defective or worn out or the wires at the switch connections could be loose, causing arcing that is making the noises. There is probably nothing wrong with your basic wiring. Switches that make arcing noises can overheat, a definite fire hazard.
The Source of Crackling Sounds Coming from Your Light Switch
If the electricity escapes from the wiring, it can cause heat to build up quickly, creating a fire hazard.
Installing recessed LED lights in an existing ceiling is simpler than installing old-school incandescent cans, which needed to be attached to ceiling joists for support. Today's LED lights are lightweight enough to not need extra support and attach directly to the surrounding drywall through the use of spring clips.