From Wye Waltz Wiki
LED strip is a relatively new innovation. It's a long strip of self-adhesive tape, with tiny LEDs spaced out along it. The tape also includes the circuit connections. This strip may be cut easily into short lengths at the connection points (typically with three LEDs every couple of inches) and is supplied by a simple 12V supply.
It's useful for bright illumination inside cabinets and displays. As the LEDs are spaced apart, it gives bright illumination without shadows.