Wi-Fi Killers and Dirty Walls

Here is a bizarre problem that cheap signs cause: they kill the Wi-Fi. Cheap LED drivers emit high levels of Electromagnetic Interference (EMI). We have seen cases where a new backlit letter sign was turned on, and the shop’s security cameras and credit card machines instantly lost connection. To prevent this "radio noise," we strictly use drivers with built-in RFI shielding and ferrite cores. It ensures that the electronics of the backlit letter stay silent in the radio spectrum, playing nicely with your neighbor’s sensitive digital equipment.