Recessed lighting accent lighting is a specialized form of recessed lighting.
As you can see from the pictures, there is sometimes a cover with a hole that helps focus the light and there is sometimes a fixture that protrudes down a little from the housing and which can be aimed.
Accent lighting is used when you wish to illuminate a specific object or area.
This type of lighting is often used to light up pieces of art but I suppose you could also use them to light up a work area (where for example your kids do their homework).
Accent light fixtures are always three inches and generally take halogen bulbs, but there are some now that use LED.
And speaking of recessed lighting for your home ….. we would love to install some for you when you live in or near San Jose.