Recessed LED downlight can be defined as a light that has been recessed into a ceiling and that throws light downwards in a narrow beam. When it is turned on, it looks like light is shining down out of the ceiling. Recessed LED downlight are comprised of a housing that is inset into the ceiling, the bulb, and a transformer in order to convert the power voltage into one that is safe for the Recessed LED downlight to use.