An IR LED is a solid state lighting ( SSL) device that emits light in the infrared range of electromagnetic radiation spectrum. IR LEDs allow for cheap , efficient production of infrared light, which is electromagnetic radiation in the 700nm to 1mm range.IR LEDs are useful in a number of types of electronics, incl. many types of remote controls for televisions and other electronics. Used with infrared cameras, IR LEDs can act like a spot light while remaining invisible to the naked eye.