This places fixtures at between 3/4 and 7/8 of the height of the door and lets those approaching the door knock or gain entry without glare in their eyes. Lights need to be high enough to illuminate the immediate porch area and steps within a few feet of the door.
intermediate definition an intermediate is a substance formed during a middle step of a chemical reaction between reactants and the desired product examples in the chemical equation
an intermediate switch is a switch of 4 terminals which is used to control devices from more than 2 locations if you want to control a device eg lamp from one locati on you use a normal switch you could see two terminals behind it