Disclosed herein is a LED and a lighting apparatus, which employs a LED as
a light source of low power and high efficiency for an optical projection
system. The lighting apparatus comprises a reflection part together with
the LED, and enhances light emitting directionality of the LED, thereby
generating parallel light or focused light suitable for the light source
of the optical projection system. The LED comprises a negative electrode
and a positive electrode formed on an identical plane with different
stack constructions, thereby reducing the number of wires between the
electrodes occupying a predetermined volume. In addition, the substrate
and the electrodes are made of a transparent material to transmit light
therethrough, so that the light source using the LED radiates light in
all direction as in the light source using the arc discharge, without
shielding the light at a rear side by the electrodes.